tax progressivity

The November 2020 - November 2022 Ethiopia-Tigray war produced a sharp economic contraction in Ethiopia visible in real GDP growth deceleration, FX-reserve depletion, birr depreciation, sovereign-spread widening, and humanitarian-aid-distortion of the external accounts.

Ghana's December 2022 IMF Extended Credit Facility programme, paired with the December 2022 domestic-debt-exchange (DDEP) and 2023 external-debt restructuring, produced a measurable but partial macro-stabilisation: cedi depreciation slowed, inflation decelerated from a peak above 50% YoY, and primary fiscal balance moved toward surplus.

Nigeria's May 2023 elimination of the petrol subsidy under President Tinubu produced a fiscally favourable but socially costly trajectory: federally-retained revenue rose, the primary fiscal balance improved relative to the 2018-2022 baseline, but headline CPI inflation accelerated and household real-consumption proxies weakened in the 12-24 months post-removal.

Sub-Saharan African economies' post-2020 COVID recovery trajectories diverged systematically along three dimensions: oil/commodity exporters (Nigeria, Angola, Gabon) underperformed on inflation; fiscally-constrained economies in debt distress (Ghana, Zambia, Ethiopia, Kenya) underperformed on growth; and tourism-dependent or fiscally- cushioned economies (Mauritius, Botswana, Senegal, Côte d'Ivoire) recovered faster.

Australia's punitive tobacco excise escalation (four 12.5% increases 2013-2020, plus plain packaging 2012) reduced adult smoking prevalence more than comparator countries that adopted less punitive, harm-reduction-friendly approaches: New Zealand (legalised vaping 2020), the United Kingdom (NHS promotes vaping as quit aid), and Sweden (snus as dominant harm-reduction product).

Countries with lower and more stable inflation over 30-year windows show smaller increases in disposable-income Gini than countries with high and volatile inflation.

Bismarckian contributory welfare architectures (Germany, Austria, Switzerland) are more fiscally sustainable than tax-financed universal architectures when demographic ageing is severe, because contribution-benefit linkage constrains expansion.

El Salvador's fiscal trajectory under Bukele (2019-2024) shows improvement in the primary balance and stabilisation (or modest decline) in debt-to-GDP after the 2020 COVID spike, achieved via a combination of: (a) the 2022-2023 bond buyback / liability-management operations, (b) the 2023 tax reform (lower rates with base-broadening and improved compliance), and (c) IMF-signalled fiscal consolidation culminating in the Dec 2024 $1.4bn Extended Fund Facility.

In an OECD-country panel 2014-2024, reductions in the top statutory capital- gains tax rate predict higher subsequent gross fixed capital formation as a share of GDP and higher business-startup rates, controlling for corporate-tax rates, interest rates, and institutional quality.

Higher capital-gains tax rates predict lower firm-entry rates, fewer IPOs, and slower venture-capital formation.

Revenue-neutral carbon taxes (with offsetting payroll or income tax cuts) predict lower emissions without net employment loss compared to cap-and-trade with grandfathering.

Developmentalist catch-up episodes generate more of their early growth through capital deepening and labor reallocation than through sustained TFP growth, which helps explain why the growth premium fades near the frontier.

Across US household-panel microdata 1980-2019, the marginal propensity to consume out of income shocks identified as permanent (lasting >5 years; e.g.

Across an OECD panel 1980-2023, the deadweight loss (excess burden) of marginal income taxation rises convexly in the top statutory marginal rate, with the slope accelerating sharply once top rates exceed roughly 50%.

Universal child-benefit / expanded child tax credit expansions (US ARP 2021, UK pre-2013 child benefit) reduced child poverty rates by measurable magnitudes in real time.

Deng Xiaoping's 1978 reforms, by introducing price signals and household responsibility in agriculture and Township-Village-Enterprise market exchange, account for the majority of Chinese poverty reduction 1978–2000 — not state investment.

Across a small set of identifiable zoning-reform events (Minneapolis 2040 plan effective 2020 abolishing single-family zoning city-wide; Houston's persistent absence of formal zoning; Tokyo's national land-use system; Auckland Unitary Plan 2016 upzoning), the post-reform housing-completion rate and rental- price growth rate diverge from comparator metros without equivalent reform: completions accelerate and rental-price growth decelerates relative to a synthetic-control donor pool of comparable metros.

Clinton welfare reform 1996 (TANF) reduced the income floor for single-parent households in recessions and raised deep-poverty rates among children, consistent with democratic-socialist critique of means-tested conditionality.

Clinton's 1996 welfare reform (TANF, work requirements) increased low-skill labour-force participation and reduced caseloads without the catastrophic child-poverty outcomes critics predicted.

Across advanced and emerging-market economies 1980-2020, constitutional or statutory fiscal rules — debt brakes, deficit ceilings, and expenditure-growth limits — predict more durable prosperity (lower growth volatility and stronger long- run income growth) than discretionary state-investment surges.

Lower statutory corporate tax rates predict higher business investment and faster capital deepening, with larger effects in open economies.

Cuba's life expectancy and infant mortality outcomes by 2000 were strong enough to rank competitively not just against Latin American peers, but against a broad ex-ante fixed pool of non-Latin-American market economies; if Cuba fails that harder comparison, the "socialist health-system superiority" story is more regional than universal.

High public-debt overhang — defined as general government gross debt exceeding 90% of GDP for at least 5 consecutive years — predicts lower private gross fixed capital formation and slower real GDP per capita growth over subsequent 30-year windows, in a broad-country panel 1970-2020.

Brazil's demographic transition 1980-2023 (TFR fall from ~4.0 to ~1.6) coincides with inequality decline post-2000 (Gini from ~0.60 to ~0.53).

Across OECD countries 1990-2023, the median gender pay gap has narrowed but the rate of narrowing has slowed since 2010, with the residual gap concentrated in (a) parenthood penalties, (b) occupational segregation, and (c) hours-of-work differences.

Ecuador's December 2008 strategic default on $3.2bn of Global 2012 and Global 2030 bonds (declared "illegitimate" by the Correa-appointed audit commission) produced a measurable medium-run sovereign-borrowing- cost penalty without delivering a fiscal-space dividend large enough to offset that penalty.

Post-2008 eurozone austerity disproportionately affected households in the bottom income quintile; distributional cost was not necessary for fiscal consolidation, given alternative tax-side options.

Fed quantitative tightening (QT) 2022-06 to 2025 — running off Treasury and MBS holdings at peak ~$95B/month (slowed to ~$60B in 2024-Q2) — produced small but detectable upward pressure on term premia and mortgage spreads, consistent with the QE channel operating in reverse but at materially weaker magnitude per dollar of balance-sheet change.

Financial-transaction taxes predict lower market liquidity, higher volatility, and reduced price-discovery efficiency.

Credible fiscal consolidation episodes — defined as sustained primary balance improvement of at least 2% of GDP over 3 years, not reversed within 5 years, and accompanied by declining debt-to-GDP trajectories — predict stronger subsequent 10-year real GDP per capita growth and private investment than repeated discretionary fiscal stimulus in mature economies, in an OECD panel 1980-2020.

Japan post-1990 has run gross public-debt-to-GDP ratios from ~70% rising to ~250%, the highest sustained level in the OECD record, WITHOUT triggering inflation, currency collapse, sovereign-spread blowout, or fiscal-dominance-induced loss of monetary control.

Post-2010 Southern-European departures from euro fiscal rules (Greece 2001–2009) produced the specific pattern Ordoliberal theory predicts: credibility loss, borrowing-cost spikes, and forced stabilisation on worse terms than voluntary rule-compliance would have produced.

Higher fiscal-transparency indices predict lower sovereign bond-yield spreads and smaller default-risk premia at given debt levels.

Countries that adopted a flat personal-income-tax regime between 1994 and 2012 experienced faster real GDP per capita growth in the decade following reform than matched non-reforming peers, controlling for initial income, institutional quality, and trade openness.

US free-community-college state experiments (Tennessee Promise 2015, Oregon 2016) raised enrolment and completion rates among low-income students without measurable fiscal crowd-out.

The labour-supply dis-employment elasticity of negative-income-tax (NIT) and earned-income-tax-credit (EITC) -style cash-transfer programmes is materially smaller than the canonical mid-1970s NIT- experiment headline estimates suggested.

German industrial gross value added, manufacturing output, and real household income diverged materially from a synthetic-Germany donor- pool counterfactual over 2018-2025, and a variance decomposition across candidate channels attributes the majority of the divergence to regulatory-channel factors (Environmental Policy Stringency index increase post-2017, nuclear-phase-out schedule, single-supplier Russian gas dependency lock-in, industrial emission and reporting rules) rather than to fiscal-channel factors (general government consumption and tax burden were broadly stable across the Merkel late-term and Scholz years, with the debt brake in effect until 2023).

In a broad-country panel 1980-2019, a larger government expenditure share of GDP predicts lower subsequent total-factor-productivity (TFP) growth, controlling for initial income, trade openness, and human capital.

Across advanced economies over 1985-2020, countries with forced-saving / architecture-based redistribution (Singapore CPF, Chilean AFP pre-2008, Australian Superannuation, Swiss mixed pension pillars) achieve comparable or superior long-run growth outcomes alongside comparable distributional improvements in household net wealth distribution relative to countries relying primarily on tax-and-transfer redistribution (Nordic cluster, UK, France).

Guatemala's 2000-2024 macro trajectory shows the migration-and- remittance development pattern: remittance inflows rose from below 3% of GDP (2000) to above 20% (2024), and the macro economy is increasingly stabilised by household-level migrant transfers rather than productive-investment-driven growth.

Countries in the top quartile of Heritage government integrity in 2024 have lower latest-available extreme-poverty headcount than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage government integrity in 2024 have lower latest-available extreme-poverty headcount.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available account ownership than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available account ownership.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available electricity access.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available employment rate than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available employment rate.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have lower latest-available extreme-poverty headcount than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have lower latest-available extreme-poverty headcount.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available female labour-force participation than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available female labour-force participation.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available real GDP per capita PPP than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available high-technology export share than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available high-technology export share.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have lower latest-available consumer-price inflation.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available gross-capital-formation share than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available gross-capital-formation share.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available life expectancy than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available life expectancy.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available physician density than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available physician density.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available real private consumption per capita than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available real private consumption per capita.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available private-credit depth than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available private-credit depth.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available tertiary enrollment than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available tertiary enrollment.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have higher latest-available trade openness than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have higher latest-available trade openness.

Countries in the top quartile of Heritage lower-government-spending score in 2024 have lower latest-available under-5 mortality than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-government-spending score in 2024 have lower latest-available under-5 mortality.

Countries in the top quartile of Heritage judicial effectiveness in 2024 have lower latest-available extreme-poverty headcount than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage judicial effectiveness in 2024 have lower latest-available extreme-poverty headcount.

Countries in the top quartile of Heritage monetary freedom in 2024 have lower latest-available extreme-poverty headcount than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage monetary freedom in 2024 have lower latest-available extreme-poverty headcount.

Countries in the top quartile of Heritage property-rights protection in 2024 have lower latest-available extreme-poverty headcount than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage property-rights protection in 2024 have lower latest-available extreme-poverty headcount.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available account ownership than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available account ownership.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available electricity access than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available electricity access.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available employment rate than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available employment rate.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have lower latest-available extreme-poverty headcount than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have lower latest-available extreme-poverty headcount.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available female labour-force participation than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available female labour-force participation.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available real GDP per capita PPP than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available high-technology export share than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available high-technology export share.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have lower latest-available consumer-price inflation than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have lower latest-available consumer-price inflation.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available gross-capital-formation share than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available gross-capital-formation share.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available life expectancy than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available life expectancy.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available physician density than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available physician density.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available real private consumption per capita than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available real private consumption per capita.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available private-credit depth than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available private-credit depth.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available tertiary enrollment than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available tertiary enrollment.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have higher latest-available trade openness than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available trade openness.

Countries in the top quartile of Heritage lower-tax-burden score in 2024 have lower latest-available under-5 mortality than bottom-quartile countries, consistent with free-market country policy regimes outperforming less market-oriented regimes on this outcome.

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have lower latest-available under-5 mortality.

Informal employment as a share of total non-agricultural employment persists at higher levels in countries with high entry barriers and burdensome product-market regulation (high OECD PMR, high Doing Business cost of starting a business), even when the state invests heavily in development projects and public infrastructure.

Higher inheritance taxes predict more frequent sale or liquidation of family businesses at founder death and lower long-run business survival.

Cross-country variation in intergenerational income mobility (commonly measured as the rank-rank slope or intergenerational income elasticity) across OECD countries is substantially explained by institutional determinants — education-system equality of provision, residential segregation, and housing affordability — rather than by the aggregate redistribution level.

Rising state-intervention burden proxies predict lower long-run quality-of-life and income growth.

Labour-market flexibilisation reforms improve unemployment outcomes in countries with strong active-labour-market-policy (ALMP) complementarities (Denmark flexicurity post-1994, Germany Agenda 2010 / Hartz I-IV 2003-2005) but produce inequality increases without commensurate employment gains in countries lacking institutional ALMP infrastructure.

In high-income countries 1990-2020, gains in life satisfaction (subjective well-being) are more strongly associated with real income growth, employment opportunity, and institutional trust than with the intensity of state economic planning or public-sector employment share.

Brazil's substantial 2003-2010 poverty reduction (extreme poverty headcount fell from ~10% to ~4% and Gini coefficient from ~0.58 to ~0.53 per PNAD/IPEA series) is decomposed across three channels: (a) Bolsa Família cash-transfer expansion (Lei 10,836 of January 2004 consolidating prior CCTs, reaching ~13 million families by 2010), (b) real minimum-wage valorisation (real minimum wage rose over 50% 2003-2010, pulling up the bottom of the formal wage distribution and indexed social transfers including BPC), and (c) the 2003-2008 commodity boom (export revenue surge, formal-employment growth, wage-bargaining leverage from tight labour markets).

Brazil's Novo Arcabouço Fiscal (Lei Complementar 200 of 2023) holds the federal primary-balance path and the real-spending growth rate within its statutory band (real primary spending growth 0.6-2.5% per year, conditional on primary-balance target attainment) through 2026, and the cumulative 2023-2026 primary- balance outcome does not diverge from target by more than one standard deviation of the historical primary-balance forecast error.

Higher share of mandatory vs discretionary spending predicts stronger automatic stabilisers and less pro-cyclical fiscal policy.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, stronger control of corruption predict faster real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, stronger control of corruption predict higher high-technology export intensity after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, stronger fiscal balances predict faster real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, stronger fiscal balances predict higher domestic savings shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, stronger fiscal balances predict deeper private credit intermediation after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, stronger fiscal balances predict higher private fixed-investment shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger government-consumption shares predict slower real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger government-consumption shares predict lower domestic savings shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger government-consumption shares predict lower manufacturing value-added shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger government-consumption shares predict lower private fixed-investment shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, more effective rule-bound public administration predict faster real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, more effective rule-bound public administration predict higher domestic savings shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, more effective rule-bound public administration predict higher manufacturing value-added shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, more effective rule-bound public administration predict higher private fixed-investment shares after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger government expenditure shares predict lower employment rates after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger government expenditure shares predict slower real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger government expenditure shares predict lower investment shares after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger government expenditure shares predict shallower private credit intermediation after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger public-debt shares predict slower real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger public-debt shares predict lower domestic savings shares after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger public-debt shares predict shallower private credit intermediation after country and year fixed effects and basic macro controls.

Across a pre-registered narrower OECD/market-peer panel from 1996 to 2021, larger public-debt shares predict lower private fixed-investment shares after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, more predictable and market-compatible regulation predict faster real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, more predictable and market-compatible regulation predict higher high-technology export intensity after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, stronger rule-of-law institutions predict faster real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, stronger rule-of-law institutions predict higher high-technology export intensity after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, higher inflation predict lower employment rates after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, higher inflation predict slower real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger tax-revenue shares predict lower employment rates after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger tax-revenue shares predict slower real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger tax-revenue shares predict lower investment shares after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, larger tax-revenue shares predict shallower private credit intermediation after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, higher trade openness predict higher employment rates after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, higher trade openness predict faster real GDP per capita growth after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, higher trade openness predict higher high-technology export intensity after country and year fixed effects and basic macro controls.

Across a pre-registered panel of OECD and major emerging-market economies from 1996 to 2023, higher trade openness predict higher private and total investment shares after country and year fixed effects and basic macro controls.

Argentina under Milei (December 2023 inauguration) executed a fiscal-surplus + monetary-contraction + de-facto-dollarisation programme that collapsed monthly CPI inflation from ~25% (Dec 2023) toward sub-3% by 2025-2026, eliminated the primary fiscal deficit within a single fiscal year, and compressed the parallel-market peso-USD gap (blue-dolar / official) from over 100% to near zero.

High-bite minimum wages (statutory floors that approach or exceed the local 50th percentile of the age-specific wage distribution) produce a multi-stage causal chain.

US state-level minimum-wage increases over 1990-2024 produce small, statistically uncertain effects on teen and low-wage employment when compared to contiguous counties or neighbouring states that did not raise their minimum.

Across OECD country-years, disposable-income Gini is materially lower than market-income Gini after taxes and transfers.

Across OECD country-years, disposable-income poverty rates are materially lower than market-income poverty rates at the 50 percent median-income line.

In OECD country-years from 1990 to 2022, higher trade-union density is associated with lower disposable-income Gini after country and year fixed effects and unemployment controls.

Higher tax burden proxies predict lower labour-force participation over long windows.

The 2021-2024 OECD inflation episode is best decomposed as ~60% supply-shock-driven (energy-price spike, supply-chain disruption, COVID labour-supply effects) and ~40% demand-driven (US fiscal stimulus, post-pandemic durable-goods boom, monetary accommodation), refuting both the pure-monetarist and pure-supply-shock framings.

Durable exit from extreme poverty (sustained above-poverty-line household consumption for at least 5 consecutive years) is more strongly associated with private formal-sector job creation than with the expansion of cash transfers or social-assistance programmes alone, over 15-25 year windows in low- and middle-income countries 1995-2020.

Higher top marginal income-tax rates predict lower taxable income reporting among high earners (behavioural response) and larger tax-avoidance industries.

In a 1996-2018 Maddison/WGI cross-section, countries with stronger rule of law should show higher mean annual GDP-per-capita growth after controlling for initial income if the property-rights growth channel is strong in between-country variation.

Higher reliance on property taxes for local government predicts stronger taxpayer accountability and better public-service quality than transfer-dependent localities.

Larger unfunded public-pension liabilities predict lower domestic investment and higher implicit debt burdens that crowd out productive spending.

Public investment in basic infrastructure (transport, energy, water, sanitation) has strong catch-up returns to real GDP per capita growth in developing and emerging economies, while persistent public transfers and subsidies have weaker or insignificant long-run growth effects, in a broad-country panel 1980-2020.

Piketty's r > g dynamic post-1980 produced wealth-to-income ratios reaching or exceeding pre-1914 levels in major OECD economies, consistent with social-democratic claims about structural inequality drift absent policy intervention.

Reagan's 1981–1986 marginal-tax-rate reductions produced measurable labour-supply response at the top of the distribution, with output growth exceeding the pre-reform trend.

Tobacco and alcohol taxes with elastic demand generate health gains but unstable revenue; inelastic-demand sin taxes generate stable revenue but smaller behavioural change.

State capacity (proxied by government effectiveness, rule of law, and fiscal extraction) is a prerequisite for effective liberal market policy.

Higher broad state-consumption burden proxies predict weaker productivity and income levels.

Industrial subsidies have positive early output effects but declining or negative productivity effects when maintained beyond 10 years in a broad panel of advanced and emerging economies during 1970-2020.

Taiwan's ITRI-led semiconductor strategy (ITRI founding 1973, UMC spinoff 1980, TSMC spinoff 1987, continued state-industry co-investment through the 1990s-2000s) produced a frontier-capability industry that market-led alternatives in comparable-income economies did not generate over the same 40-year window.

Automatic indexation of tax brackets to inflation prevents real tax burden increases and supports labour-supply growth.

Countries with broader tax bases and lower marginal rates show stronger long-run investment and GDP growth than countries with narrow bases and high rates.

At high-income levels (GDP per capita above OECD median), very high tax burdens — defined as total tax revenue above 40% of GDP — predict weaker long-run total factor productivity growth unless paired with unusually high state capacity (top tercile WGI Government Effectiveness) and high labour- market flexibility (top tercile OECD EPL), in an OECD and high-income panel 1980-2020.

International tax competition for mobile capital predicts lower corporate rates but does not reduce total corporate revenue when bases are broad.

Higher broad tax-burden proxies predict lower control-of-corruption and trust-related governance outcomes.

More tax exemptions and special regimes predict higher compliance costs, larger avoidance sectors, and lower effective progressivity.

Argentine tax-cut episodes — Macri 2017 simplification (export-tax cuts, income-tax floor adjustments, asset-revaluation amnesty) and Milei 2024 cuts (PAIS-tax simplification, top-rate adjustments, dollarisation- preparation framework) — produced upward shifts in the Argentine top-1 pretax income share over their respective post-treatment windows vs LATAM synthetic control, but with the headline-rate effect attenuated by 100+ percent inflation regimes that mechanically inflate measured capital-income realisations.

The Australian Rudd-Swan 2008-2010 top-rate adjustments (Medicare-levy surcharge changes + temporary flood levy 2011 + ongoing top-bracket threshold movements) plus the 2014-2017 Abbott temporary deficit-levy produced top-1 pretax income share dynamics with an absolute elasticity to the headline top rate below 0.5, consistent with the Australian imputation-credit franking system reducing the income-shifting margin for high-earner business owners.

The 2021 expansion of the US Child Tax Credit under the American Rescue Plan (full refundability + monthly payments + raised maximum) reduced the official + Supplemental Poverty Measure child poverty rate by at least 3 percentage points within the six-month payment window (July- December 2021), with a sharp reversion after expiration in 2022Q1.

Brazilian tax-base evolution 1995-2024 — Real Plan stabilisation 1994 + CPMF transactions tax 1997-2007 + Lula CCT funding 2003-2010 + Dilma fiscal expansion + Bolsonaro tax simplification proposals + Lula 2024 consumption-tax reform — produced disposable-income Gini reduction of at least 3 Gini-points over 1995-2024 driven primarily by transfer-side expansion rather than tax-progressivity.

The 2003 Jobs and Growth Tax Relief Reconciliation Act (JGTRRA), which cut US qualified-dividend and long-term-capital-gains rates to 15 percent, shifted the composition of top-1 pre-tax income toward dividend and capital-gains realisations between 2003 and 2007, raising the top-1 share by 1.5 to 3 percentage points relative to the pre-2003 trend.

The 2016 Trudeau federal top marginal income tax bracket (33 percent on income above CAD 200,000, raising combined federal-provincial top rate to 53.5 percent in Ontario) produced a measurable but transitory forestalling spike in reported top-1 pretax income share in 2015 with partial reversion by 2018, consistent with a Canadian ETI estimate in the 0.4-0.7 range as documented by Milligan-Smart.

Chilean post-Pinochet tax progressivity reforms — Concertación-era Aylwin-Frei marginal-rate increases 1990-1995, Bachelet 2014 reform raising corporate rate from 20 to 27 percent + DTA tightening, Boric 2022-2024 reform attempts — produced gradual reductions in the Chilean top-1 pretax income share by at least 1.5 percentage points over 1990-2024 vs Latin-American synthetic comparator pool, with most of the level shift concentrated in 1990-2000 rather than the recent reform attempts.

China's 2016 VAT reform (replacing the business tax on services with VAT, unifying VAT across goods and services with 17/13/11/6 percent rate slabs subsequently consolidated to 13/9/6 in 2019) produced no detectable change in the Chinese disposable-income Gini coefficient vs East-Asia synthetic control over 2016-2020, with the formalisation benefits offsetting the consumption-tax incidence regressivity.

The 1993 Omnibus Budget Reconciliation Act (OBRA-1993), which raised the US top marginal income tax rate from 31 to 39.6 percent and added the 36 percent bracket, produced a transitory dip in the reported top-1 pre-tax income share via timing-shifted realisations into 1992, but no persistent level reduction in the top share by 1996 once the realisation pull-forward unwinds.

Estonia's 1994 flat-tax 26 percent (subsequently reduced to 20 percent by 2015) and the unique 2000 corporate-tax reform (taxing only distributed corporate profits) produced a measurable rise in the Estonian top-1 pretax income share over 1994-2010 vs Baltic synthetic comparator (LVA, LTU), with the distributed-profit-only corporate regime channelling capital-income into top-decile reported income while reducing taxation of retained earnings.

Macron's 2017 reform replacing the French ISF (Impot de Solidarite sur la Fortune) with the IFI (real-estate-only wealth tax) and the introduction of the 30 percent flat tax (PFU) on capital income produced a measurable rise in the French top-1 pre-tax income share over 2018-2022 relative to Eurozone synthetic control, but a smaller-than-projected fall in HNW emigration once concurrent CRS enforcement is accounted for.

The 2000 Schroder corporate + personal tax reform package (top personal rate cut from 53 to 42 percent staged 2000-2005, corporate rate cut from 40 to 25 percent, capital-gains exemption on inter-corporate shareholdings) is associated with a 1.0 to 1.5 percentage point rise in the German top-1 pre-tax income share over 2000-2008 vs Eurozone synthetic control, but no measurable rise in aggregate output growth beyond Eurozone trend.

Greek Memorandum-era tax hikes 2010-2018 (top marginal income rate raised to 45 percent, VAT hikes to 24 percent standard, ENFIA recurring property tax 2014, solidarity surcharge 2011-2019) raised the disposable-income Gini coefficient by at least 1.5 Gini-points relative to Eurozone- comparator synthetic control over the period, with the regressivity driven by VAT and property-tax incidence rather than income-tax progressivity.

India's 2017 GST implementation (replacing fragmented state VAT/excise with unified GST with five rate slabs 0/5/12/18/28 percent) produced a short-run regressive distributional bite — measurable rise in disposable- income Gini over 2017-2019 — followed by partial reversal as input-tax- credit pass-through stabilised by 2021.

Italian IRPEF flattening (Berlusconi 2003 bracket reduction from five to three brackets, Renzi 2014 EUR 80 monthly bonus, Meloni 2024 three-bracket structure) over 2002-2024 produced a measurable rise in the top-10 pretax income share but a flat-to-declining top-1 share, consistent with the view that bracket-flattening compresses upper-middle-class progressivity rather than substantially benefitting the very top in a high-evasion-rate jurisdiction.

Japan's three consumption-tax hikes (1997 3->5, 2014 5->8, 2019 8->10 percent) raised the disposable-income Gini coefficient by at least 0.3 Gini-points cumulatively relative to G7-ex-JPN comparator synthetic control, with the regressivity bite partially offset by simultaneous tax-rebate / cash-transfer programmes.

South Korea's Moon-era progressive turn 2017-2020 (top marginal rate raised from 40 to 42 then 45 percent, corporate top rate raised from 22 to 25 percent, capital-gains broadening) produced a measurable decline in the Korean top-1 pretax income share by at least 0.5 percentage points over 2017-2022 vs East-Asia synthetic control, consistent with the public-finance literature where rate increases in evasion-constrained but enforcement-intensifying environments produce real distributional effects.

The Pena Nieto 2014 Mexican tax reform (top marginal income tax rate raised from 30 to 35 percent, capital-gains taxation introduced at 10 percent, dividend tax 10 percent) produced a measurable but small reduction in the Mexican top-1 pretax income share over 2014-2018 vs LATAM synthetic control, with the effect attenuated by Mexico's high informal-sector share which limits the formal-tax-base distributional margin.

Norway's continued retention of an annual wealth tax (formuesskatt) through 2024 — at rates of 0.85-1.1 percent on net wealth above NOK 1.7M — is associated with a top-1 wealth share trajectory that lies below the Nordic-ex-Norway synthetic counterfactual by at least 1 percentage point over 2010-2024, without a large register-based HNW emigration response prior to the 2022 rate increase.

New Zealand's 2010 tax swap (GST rate raised from 12.5 to 15 percent, paired with personal income tax rate cuts including the top rate from 38 to 33 percent) produced a measurable rise in the New Zealand top-1 pretax income share over 2010-2014 vs Anglo-comparator synthetic control, with smaller but detectable rise in the disposable-income Gini coefficient driven by the GST regressivity.

The 1981 Economic Recovery Tax Act (ERTA) cutting the US top marginal income tax rate from 70 to 50 percent produced a measurable rise in the top-1 percent pre-tax national income share within five years, consistent with the Saez-Slemrod-Giertz elasticity-of-taxable-income literature where most of the apparent response is income-shifting and reporting-form changes rather than real labour-supply expansion.

The 1986 Tax Reform Act (TRA86) — which paired a top-rate cut from 50 to 28 percent with substantial base-broadening (passive-loss limits, AMT expansion, capital-gains rate harmonisation) — produced a smaller persistent top-1 income share response than ERTA 1981 once the one-off 1986-1988 realisation spike from capital-gains reclassification is removed.

The 2001 Russian Putin-Kasyanov 13 percent flat income tax (replacing a three-bracket schedule with top rate 30 percent) produced a measurable rise in reported tax compliance and a discrete jump in the Russian top-1 pretax income share over 2001-2005, with most of the apparent share rise attributable to compliance/reporting gain rather than real redistribution.

Post-apartheid South African tax structure (top marginal income rate raised to 45 percent in 2017, capital-gains inclusion ratio raised 2012 + 2016, recurring property-tax effective burden via municipal rates) produced a measurable reduction in the South African top-1 pretax income share over 1995-2024 vs SADC synthetic comparator pool, with the recurring property-tax channel contributing more than the marginal-income-rate channel to the distributional effect.

Spanish top marginal income tax rate dynamics — Zapatero 2007 cut to 43 percent, Rajoy 2012 hike to 52 percent, Sanchez 2021 hike to 47 percent + IGF (solidarity wealth tax) 2022 — produce top-1 pre-tax income share responses that are smaller in absolute magnitude than the OECD median, consistent with a labour-market with relatively compressed top-decile wage structure (high public-sector and family-firm capture of top income).

The Swedish 1991 "tax reform of the century" — flat 30 percent rate on capital income, top labour-income marginal rate cut from 80 to 50 percent, + base broadening — produced a sharp rise in measured top-1 pre-tax income share between 1991 and 1995 driven primarily by the dual-rate income- shifting incentive (capital-income reclassification of high-earner business income), with smaller persistent labour-supply response.

The Tax Cuts and Jobs Act 2017 produced after-tax income gains that were monotonically increasing in pre-tax income decile through 2019, with the top decile capturing more than 35 percent of cumulative after-tax income gain over 2018-2019 — orthogonal to the existing TCJA growth-effect spec which targets aggregate output.

Nigel Lawson's 1988 budget cut the UK top marginal income tax rate from 60 to 40 percent, producing a discrete jump in the UK top-1 pre-tax national income share within three years that exceeds the contemporaneous G7-ex-UK trajectory.

The UK's temporary 50 percent additional rate on income above GBP 150,000 (introduced April 2010, reduced to 45 percent April 2013) produced a large transitory dip in reported top-1 pretax income share via 2009-2010 realisation forestalling, with limited persistent effect once the realisation pull-back unwinds.

Higher broad tax burden proxies predict slower disposable-income and consumption growth.

Simpler tax systems — measured by fewer tax payments per year, lower time spent on tax compliance, and fewer separate taxes — predict higher entrepreneurship rates (new business registrations per 1,000 working-age adults) and stronger small-firm employment growth over 20-year windows, in a broad-country panel 2000-2020.

Tax simplification (fewer filings, flat rates, presumptive thresholds) predicts faster small-firm employment growth and higher formalisation.

Broader tax-treaty networks predict higher bilateral FDI flows and stronger productivity spillovers to domestic suppliers.

Trump's 2017 Tax Cuts and Jobs Act produced smaller investment and output responses than Laffer-curve advocates projected, consistent with New Keynesian estimates of corporate-tax-cut passthrough in a near-full-employment economy with inelastic long-run investment supply.

The growth of the top-1% pre-tax national income share across OECD economies over 1980-2020 is primarily driven by two channels that are consistent with marginal-product returns in skill-biased and capital- deep economies — (a) specialist-wage growth concentrated in superstar- firm and specialist-services sectors, and (b) capital-income growth driven by asset-price appreciation relative to wage income — with material but smaller contributions from (c) rent-extraction indicators (finance-sector share, executive-compensation-to-worker-pay ratio) and (d) sector concentration effects.

In the cross-country panel of advanced economies post-1980, the top-1 percent share of total pre-tax national income exhibits a structural break upward in countries that adopted the Anglo-American liberalisation package (US, UK, Canada, Australia, New Zealand) and a flat-or-mildly- rising trajectory in coordinated-market economies (Germany, France, Sweden, Denmark, Netherlands), even though both groups experienced comparable real GDP per capita growth.

Progressive income-tax marginal rates (up to roughly 70% top rate) have been compatible with strong growth in post-war US 1945-1980 and Nordics, falsifying extreme-Laffer-curve positions.

Brazil's tariff schedule under Mercosur Common External Tariff (CET) commitments has been historically high relative to other middle-income economies and has not declined materially over 1995-2020 — Brazil weighted applied tariffs hovered around 10-12% throughout the period vs OECD median ~3% and emerging Asia median ~6-7%.

Large expansions of means-tested or categorical transfers without work- incentives or activation requirements predict lower prime-age labour-force participation rates over 15-20-year windows relative to expansions that incorporate negative-income-tax or earned-income-tax-credit designs, in an OECD and rich-country panel 1980-2020.

The September 2022 UK gilt-market dysfunction had its operative amplification mechanism in the foreign-currency-collateral exposure of the Liability-Driven Investment (LDI) leveraged-derivative chain in the UK pension system, not in a "fiscal limit" reached by the sovereign issuer.

Post-1980 OECD countries with higher union density and collective-bargaining coverage maintained lower inequality growth without measurable cumulative growth penalty.

Large-scale universal or near-universal transfer programmes produce a three-order causal chain.

Child-poverty rates in EU countries with universal child-benefit systems are substantially lower than in means-tested systems at similar tax-and-transfer cost.

Uruguay's 2005-2020 Frente Amplio era (Vázquez I, Mujica, Vázquez II) expanded the welfare state (Plan de Equidad 2008, Asignaciones Familiares expansion, FONASA universal-health integration 2008, Sistema Nacional Integrado de Cuidados 2015), legalised cannabis 2013, and ran a centre-left fiscal-and-redistributive programme without abandoning macroeconomic orthodoxy.

US 1945-1973 coordinated labour-management-state compact produced broad-based real-wage growth tracking productivity, demonstrating that strong labour institutions + progressive taxation are growth-compatible.

US post-2008 recovery shows rising GDP per capita alongside stagnant or declining median-household ISEW/GPI indicators, consistent with Daly's diminishing-returns-to-growth.

Higher VAT efficiency (revenue/product of standard rate and consumption base) predicts stronger public-finance sustainability and lower debt drift.

Post-2008 global climate finance via private carbon markets (voluntary credits, REDD+) produced marginal real emissions abatement relative to stated volumes, while public-funded mandates delivered measurable reductions.

Wealth taxes predict capital flight, lower reported domestic wealth, and reduced investment, especially when valuation is subjective and enforcement uneven.

Wealth taxes produce a three-order causal chain.

Japan's 2004 basic-pension reform (introducing macroeconomic-slide indexation, raising employee contributions in stages to 18.3% by 2017, raising age of full-eligibility to 65) materially extended fiscal sustainability of the pension system through the 2010s without producing the projected step-down in elderly-poverty rate, illustrating a sustainability-versus-adequacy tradeoff that motivated subsequent 2012 and 2020 supplementary-benefit additions.

Singapore's CPF reform sequence 2013-2024 — MediShield Life 2015, CPF Life 2013-2024 evolution, Silver Support Scheme 2016, Workfare Income Supplement increases, Lease Buyback Scheme expansion, Retirement Sum increases — preserved the CPF forced-saving architecture's macro-savings rate while materially reducing elderly-poverty rate from 41% (2014 OECD harmonised) to under 20% by 2024 through targeted top-up mechanisms, demonstrating that CPF-style architecture is upgradeable on adequacy without abandoning the forced-saving foundation.

PRWORA 1996 (TANF block-grant + work requirements) raised single-mother labour-force participation by at least 5 percentage points relative to single-childless-women within five years of state TANF adoption, holding constant EITC expansion and the late-1990s tight labour market.

Sweden's 1990s welfare-state consolidation (replacement-rate cuts to sickness/unemployment insurance 1991-1996, 1998 pension reform to NDC, child-allowance flatten 1996-2006) preserved poverty/inequality outcomes (Gini and bottom-40 income share) within plus-or-minus 5% of pre-crisis levels while restoring fiscal sustainability (debt/GDP back below 50% by 2008), supporting the scale-preserving consolidation interpretation rather than retreat from the universal-transfer model.

Alaska's Permanent Fund Dividend (PFD, established 1982 paying annual dividends to all Alaska residents from oil-revenue-funded sovereign wealth) — averaging USD 1100-2000 per resident-year over 1982-2024 — has produced a measurable and persistent reduction in extreme-poverty rate of at least 3 percentage points relative to a synthetic-control of comparable resource-rich US states (Wyoming, North Dakota, Texas, Louisiana) without affecting state-level employment-rate, providing the longest- running natural-experiment evidence for non-trivial unconditional-cash-floor effects in a US-state high-income institutional environment.

Finland's 2017-2018 Basic Income Experiment (2000 randomised unemployed-benefit recipients receiving EUR 560/month unconditional cash for 24 months versus matched-control unemployed-benefit recipients) produced a small positive employment effect — ATT of less than 6 days additional employment in year 2 — and a measurable improvement in self-reported wellbeing and trust-in-government, providing the cleanest RCT evidence available for unconditional-basic-income labour-supply effects in a high-welfare- state institutional context.

Hong Kong's HKD 10,000 universal cash payout to permanent residents (announced February 2020, disbursed June-July 2020, total cost approximately HKD 71B) functioned as a near-universal-basic- income natural experiment with 7M+ recipients in a high-administrative-capacity environment, providing a clean test of universal-cash macro-stimulus effects on household consumption and a comparison case for less-targeted relief.

Italy's Reddito di Cittadinanza (RdC, March 2019) reduced absolute-poverty headcount among low-income Italian households by at least 15% within three years (2019-2022) but produced no measurable improvement in employment-rate among working-age beneficiaries, identified off the synthetic-control gap with EU peers (ESP, GRC, PRT) lacking comparable means-tested guaranteed-minimum-income programmes pre-2020.

South Korea's Earned Income Tax Credit (EITC, introduced 2009 with subsequent expansions 2012, 2015, 2019) raised labour-force-participation among low-income married women by 2 to 4 percentage points within five years of each expansion threshold change, identified off discontinuity in eligibility-cliff income brackets across years using a regression-discontinuity-in-time framework consistent with US EITC literature (Eissa-Liebman 1996; Hoynes-Patel 2018).

Mexico's 2019 phase-out of Prospera (formerly Oportunidades / Progresa, the canonical CCT programme studied since 1997) and replacement with un-conditional cash-transfer schemes under AMLO produced a measurable rise in extreme-poverty headcount and a deterioration in school-attendance among poor children of at least 3 percentage points within three years (2019-2022), identified off the synthetic-control gap with LatAm peers (BRA, COL, PER) maintaining CCT continuity.

Portugal's 2010-2012 austerity-era rollback of the Rendimento Social de Inserção (RSI) — eligibility restrictions, value freezes, and stricter conditionality under the Troika programme — raised severe material deprivation among working-age households by at least 3 percentage points within 4 years, identified off the synthetic-control gap with Greece-excluded southern-EU donor pool, demonstrating that residualisation of guaranteed-minimum-income programmes during fiscal consolidation has measurable poverty cost.

South Africa's social-grants system (Old Age Pension extension 1998, Child Support Grant 1998-2012 expansion to age 18, Disability and Foster Care Grants, Social Relief of Distress 2020-2024) reaching 18+ million recipients — roughly 30% of population — has produced sustained reductions in extreme- poverty headcount of 6 to 10 percentage points relative to a synthetic-control of upper-middle-income Sub-Saharan and LatAm peers without comparable grant-coverage scale, while exerting fiscal-pressure costs visible in National Treasury MTBPS structural-balance projections.

Spain's Ingreso Mínimo Vital (IMV, June 2020 emergency-launched during COVID) reached fewer than half of intended-eligible households within 24 months due to take-up frictions, producing a measured reduction in extreme-poverty headcount of less than 3 percentage points by 2022 — well below the pre-launch government estimate of 7-10pp — and providing a natural test of unconditional-floor design in a high-frictions administrative environment.

The Stockton SEED guaranteed-income trial (Feb 2019 - Jan 2021, 125 randomised treated recipients receiving USD 500/month for 24 months in low-income Stockton CA neighbourhoods) produced a measurable full-time-employment-rate increase of approximately 12 percentage points in the treated group versus control, as reported in the West-Castro 2021 evaluation, providing US-context RCT evidence that unconditional-cash floors can complement rather than substitute for labour-market participation among working-age low-income recipients.

The American Rescue Plan Act (March 2021) expansion of the Child Tax Credit to USD 3000-3600 per child with full refundability and monthly disbursement (July-December 2021) produced a measurable and immediate decline in monthly child-poverty rate of at least 4 percentage points (Center on Poverty and Social Policy at Columbia time-series), with the credit's December 2021 expiration producing a corresponding immediate reversal — providing high-frequency event-window evidence on near-instantaneous cash-transfer-to-poverty mechanics.

Cumulative US EITC expansions 1975-2020 (1975 introduction, 1986 TRA expansion, 1990/1993 OBRA expansions, 2009 ARRA expansion, 2017 TCJA marginal changes) produced a long-run reduction in single-mother poverty rate of at least 6 percentage points and an increase in single-mother labour- force participation of at least 4 percentage points relative to a counterfactual without the cumulative expansions, identified off state-EITC-supplement variation in panel-FE design and the major-expansion event-windows.