Pre-registration
Across the OECD 38, over 2000-latest, larger general government final consumption as a share of GDP is associated with slower growth in real household disposable income per capita, controlling for demographics, initial-income level, energy-price exposure, and trade openness. The quantitative claim is that a 1-percentage-point higher share of general government consumption in GDP is associated with roughly 0.05 to 0.20 percentage points lower annual growth in real household income per capita, conditional on controls, with the relationship holding across (a) pooled cross-section, (b) two-way fixed-effects panel, and (c) synthetic-control event studies around Milei 2023 Argentina, Thatcher 1979 UK, Chávez 1999 Venezuela, and Balcerowicz 1990 Poland — four pre-registered policy pivots spanning the state-shrinks and state-grows directions. The hypothesis is an empirical test of a "state size effect on household income," pre-registering the sign, magnitude, and triangulation strategy so that a null or reversed finding forces a corresponding update on the market-liberal prior.
Falsification criterion — what would disprove this
This hypothesis is considered falsified if:
Not supported if the estimated coefficient on general government consumption / GDP (primary IV) in the two-way FE panel (primary estimator) is (a) positive at any conventional significance level, OR (b) negative but with p > 0.10, OR (c) negative and significant but with an absolute magnitude smaller than 0.05 percentage points of HH-income-growth per 1 percentage point of state size. In addition, the hypothesis is weakened if the synthetic-control triangulation produces opposite-signed effects in ≥ 2 of the 4 pre-registered pivots — a single dissenting pivot is compatible with the hypothesis (measurement error, case-specific confounders) but two or more is a meaningful refutation signal.
formal test & threshold
test: state_size_coefficient_triangulated_across_three_estimators threshold: β_gov_cons_share (panel FE, primary outcome) <= -0.0005 per 1pp (i.e. ≤ −0.05 ppt income-growth per 1pp state size) at p <= 0.10 AND cross_section_coefficient sign matches panel FE sign AND synthetic_control_pivots_agreement_count >= 3 of 4 (≥ 3 pivots show sign consistent with hypothesis)
Method
- Template
panel_fe- Fixed effects
country, year- Clustering
country- Sample
- 40 countries · 2000 – 2023
- Evidence type
- causal
Triangulation across three estimators (all pre-registered): (1) Pooled cross-section: country-average state-size vs country-average HH-income growth over 2000-2019 (pre-COVID window), with the full control set. Reports the raw partial correlation with heteroskedasticity-robust SEs. (2) Two-way FE panel: annual observations with country and year FE, Driscoll-Kraay SEs clustered by country. Identifies the within- country association after absorbing time-invariant country heterogeneity and global common shocks. (3) Synthetic-control event studies around four pre-registered policy pivots: Milei 2023 Argentina (state-shrinks direction), Thatcher 1979 UK (state-shrinks direction), Chávez 1999 Venezuela (state- grows direction), Balcerowicz 1990 Poland (state-shrinks direction). Each treated unit is matched to a donor pool of level-comparable non-pivot economies and the synthetic-minus- treated HH-income trajectory is reported over the 10-year post-pivot window. Pre-trend RMSPE reported; placebo permutation p-values reported. The three estimators probe different identifying assumptions. A clean finding requires the sign and approximate magnitude to line up across at least two of the three. A split result (e.g. panel FE supports, synthetic control does not) is reported as a split and not resolved in favour of either. Known limitations: (a) General government consumption / GDP is a coarse state-size proxy; it excludes transfer payments and public investment. A v2 with broader fiscal aggregates is planned. (b) Reverse causality: slow-growth economies may expand the state sector counter-cyclically. The two-way FE and the event-study design each attack this from different angles but do not eliminate it. (c) Milei 2023 synthetic control has only ~2 years of post-treatment data as of the 2026 vintage; that synthetic is pre-registered but flagged as preliminary.
Data
| Variable | Source | Transform |
|---|---|---|
real_household_disposable_income_pc_growth outcome | constructed:OECD national accounts HH disposable income per capita real (fallback: world_bank_wdi:NY.GDP.PCAP.KD deflated). Specialitier 5 | annual_log_change |
real_gdp_per_capita_growth outcome | world_bank_wdi:NY.GDP.PCAP.KDtier 2 | annual_log_change |
general_government_consumption_pct_gdp treatment | world_bank_wdi:NE.CON.GOVT.ZStier 2 | level |
log_initial_gdp_per_capita_ppp control | world_bank_wdi:NY.GDP.PCAP.PP.KDtier 2 | log_initial_period_level |
working_age_population_share control | world_bank_wdi:SP.POP.1564.TO.ZStier 2 | level |
log_population control | world_bank_wdi:SP.POP.TOTLtier 2 | log |
trade_openness control | world_bank_wdi:NE.TRD.GNFS.ZStier 2 | level |
energy_import_exposure control | world_bank_wdi:EG.IMP.CONS.ZStier 2 | level |
debt_to_gdp control | imf:GGXWDG_NGDPtier 2 | level |
wgi_government_effectiveness control | wgi:GOV_WGI_GE.ESTtier 4 | level |
● ready · ● pending · ● reconstruct-needed
Detailed result card
Result card — state_size_reduces_household_income_growth
Verdict: PARTIAL — coef=-1.248e-17, p=0.809; effect magnitude effectively zero
Pre-registration
- Claim: Across the OECD 38, over 2000-latest, larger general government final consumption as a share of GDP is associated with slower growth in real household disposable income per capita, controlling for demographics, initial-income level, energy-price exposure, and trade openness. The quantitative claim is that a 1-percentage-point higher share of general government consumption in GDP is associated with roughly 0.05 to 0.20 percentage points lower annual growth in real household income per capita, conditional on controls, with the relationship holding across (a) pooled cross-section, (b) two-way fixed-effects panel, and (c) synthetic-control event studies around Milei 2023 Argentina, Thatcher 1979 UK, Chávez 1999 Venezuela, and Balcerowicz 1990 Poland — four pre-registered policy pivots spanning the state-shrinks and state-grows directions. The hypothesis is an empirical test of a "state size effect on household income," pre-registering the sign, magnitude, and triangulation strategy so that a null or reversed finding forces a corresponding update on the market-liberal prior.
- Falsification rule: Not supported if the estimated coefficient on general government consumption / GDP (primary IV) in the two-way FE panel (primary estimator) is (a) positive at any conventional significance level, OR (b) negative but with p > 0.10, OR (c) negative and significant but with an absolute magnitude smaller than 0.05 percentage points of HH-income-growth per 1 percentage point of state size. In addition, the hypothesis is weakened if the synthetic-control triangulation produces opposite-signed effects in ≥ 2 of the 4 pre-registered pivots — a single dissenting pivot is compatible with the hypothesis (measurement error, case-specific confounders) but two or more is a meaningful refutation signal.
- Falsification test: state_size_coefficient_triangulated_across_three_estimators
Estimate
- Method: linearmodels.PanelOLS
- Coefficient (treatment): -1.248e-17
- Std error: 5.166e-17
- p-value: 0.809
- Observations: 735, countries: 33
- Within R²: 1
- Fixed effects: entity=True, time=True
- Clustering: country
Variables resolved
world_bank_wdi:NY.GDP.PCAP.KD→ real_gdp_per_capita_growth (outcome, publisher=world_bank_wdi, n=12104)world_bank_wdi:NE.CON.GOVT.ZS→ general_government_consumption_pct_gdp (treatment, publisher=world_bank_wdi, n=9133)world_bank_wdi:NY.GDP.PCAP.PP.KD→ log_initial_gdp_per_capita_ppp (controls, publisher=world_bank_wdi, n=8325)world_bank_wdi:SP.POP.1564.TO.ZS→ working_age_population_share (controls, publisher=world_bank_wdi, n=16965)world_bank_wdi:SP.POP.TOTL→ log_population (controls, publisher=world_bank_wdi, n=14447)world_bank_wdi:NE.TRD.GNFS.ZS→ trade_openness (controls, publisher=world_bank_wdi, n=10714)world_bank_wdi:EG.IMP.CONS.ZS→ energy_import_exposure (controls, publisher=world_bank_wdi, n=5804)imf:GGXWDG_NGDP→ debt_to_gdp (controls, publisher=imf, n=8113)wgi:GOV_WGI_GE.EST→ wgi_government_effectiveness (controls, publisher=wgi, n=5168)
Variables missing data
constructed: OECD national accounts HH disposable income per capita real (fallback: world_bank_wdi:NY.GDP.PCAP.KD deflated). Specialist OECD SNA fetcher pending for the HH-specific series; WDI GDP-pc-constant used as v1 fallback with a known attenuation bias.(outcome, name=real_household_disposable_income_pc_growth) — vintage not on disk
Generated by scripts/run_panel_fe.py at 2026-06-29T17:52:35+00:00
Strongest opposing argument
Every hypothesis ships with its charitable opposing argument. The framework earns credibility by handling objections at their strongest, not weakest.
Notes
This is mega-spec D.1 #1, the flagship state-size test. It is deliberately the broadest fiscal hypothesis in the library and is expected to be cited as the anchor for every narrower fiscal-channel claim. The triangulation (cross-section + panel FE + four synthetic controls) is heavier than strictly necessary for a single hypothesis; that cost is accepted to make the finding robust enough to stand as an anchor. Data readiness: - WDI NE.CON.GOVT.ZS (ready) - WDI NY.GDP.PCAP.KD, NY.GDP.PCAP.PP.KD (ready) - WDI SP.POP.*, NE.TRD.GNFS.ZS, EG.IMP.CONS.ZS (ready) - IMF GGXWDG_NGDP (ready) - WGI GE.EST (ready) - OECD SDD HH disposable income (pending — falls back to WDI GDP-pc-KD at v1 with an explicit attenuation-bias flag; re-runs automatically on OECD SDD fetcher landing)