IESET.
Hypotheses·fiscal·welfare_state_market_flexibility_complement

Large welfare states sustain long-run real GDP per capita growth when paired with market flexibility (low product- and labour-market barriers), trade openness, and fiscal discipline (debt-to-GDP below 90%), but not when paired with rigid product and labour markets, in an OECD and rich- country panel 1980-2020.

The directional claim is that the interaction between welfare-state size (social transfers + public consumption as % of GDP) and a composite flexibility-openness-discipline index is positive and significant for growth, while welfare-state size alone shows no effect or a negative effect.

PARTIALengine/runs/welfare_state_market_flexibility_complement

PARTIAL — coef=+3.308e-18, p=0.653; effect magnitude effectively zero

confidence cueThe result is useful, but not decisive. Treat it as a clue, not a settled conclusion.

policy briefMixed or noisy

In ordinary language

When countries open more of the economy to trade and competition, do people end up with better long-run income or productivity outcomes?

plain answer

The evidence is suggestive but not decisive. coef=+3.308e-18, p=0.653; effect magnitude effectively zero

why it matters

This matters because fiscal claims should change belief only when they survive a pre-declared empirical test.

how the test works

It compares 35 country or place units from 1980 to 2020, using a panel fe design, with fixed effects for country and year.

what was measured
What changed
  • Welfare state size
  • Market flexibility openness discipline index
Possible pathway
  • Employment rate
  • Labour productivity growth
What we checked
  • Real income per capita growth
  • Real household disposable income growth
what this does not prove

A single test is not the whole truth. It narrows the claim under a specific sample, time period, and method. Strong policy conclusions need the pattern to survive nearby tests, alternative data, and serious objections.

verification

6 input datasets, 4 unresolved missing series, provenance status: incomplete.

Results

engine/runs/welfare_state_market_flexibility_complement
1007550250198020002020AUSAUTBELCANCHECHLCZE
illustrative sketch · run pending
No coefficients yet. When the model fires, this chart will show real_gdp_per_capita_growth across 35 sampled countries over 1980–2020.
The shapes above are stylised — none of the lines are real data.
Placeholder for welfare_state_market_flexibility_complement. Published chart will be generated from engine/runs/welfare_state_market_flexibility_complement/chart_data.json.

Who has skin in the game — schools predicting on this

2 schools list this hypothesis as a test of their position. The chips below are school-level scoreboard outcomes, not a second hypothesis verdict.

hypothesis verdict vs scoreboard outcome

The banner verdict judges this hypothesis as written. The scoreboard asks whether each school's polarity-corrected prediction was right. Raw status is not a school win: SUPPORTED supports schools that needed SUPPORTED, but refutes schools that needed REFUTED.

Empirical Pragmatist (the framework's house position)wins if SUPPORTEDpartial/no-callSocial Democraticwins if SUPPORTEDpartial/no-call

Pre-registration

pre-registered
first-spec commit 5ce4495 · 2026-05-02T19:11:20Z
run generated · 2026-06-29T17:52:38Z

Large welfare states sustain long-run real GDP per capita growth when paired with market flexibility (low product- and labour-market barriers), trade openness, and fiscal discipline (debt-to-GDP below 90%), but not when paired with rigid product and labour markets, in an OECD and rich- country panel 1980-2020. The directional claim is that the interaction between welfare-state size (social transfers + public consumption as % of GDP) and a composite flexibility-openness-discipline index is positive and significant for growth, while welfare-state size alone shows no effect or a negative effect.

Falsification criterion — what would disprove this

set before the run · honoured after

This hypothesis is considered falsified if:

SUPPORTED if β3 (welfare × flexibility) is positive and significant at p<0.10, AND the marginal welfare effect is negative or insignificant in the bottom tercile of flexibility and positive or insignificant in the top tercile. PARTIAL if β3 is positive and significant but β1 is also positive (welfare helps regardless, just more with flexibility). REFUTED if β3 is negative and significant. INFORMATIVE: the result should survive excluding the Nordic countries; if not, it is a Nordic- specific story.

formal test & threshold
test:      panel_fe_welfare_flexibility_interaction_growth_oecd
threshold: β_interaction > 0 at p<=0.10  AND Marginal welfare effect <= 0 or p>=0.10 in bottom tercile  AND Marginal welfare effect >= 0 or p>=0.10 in top tercile  AND Ex-Nordic robustness retains sign of β_interaction.

Method

Template
panel_fe
Fixed effects
country, year
Clustering
country
Sample
35 countries · 1980 – 2020
Evidence type
associational

Two-way FE panel with interaction: growth = β0 + β1*welfare_size + β2*flexibility_index + β3*(welfare_size × flexibility_index) + controls + FE. Subsample analysis at terciles of flexibility index. Robustness: (1) use Fraser EFW overall index instead of constructed composite; (2) exclude Nordic countries; (3) use 5-year non-overlapping averages; (4) separate product-market and labour-market flexibility interactions.

Data

VariableSourceTransform
real_gdp_per_capita_growth
outcome
world_bank_wdi:NY.GDP.PCAP.KDtier 2
annual_log_change
real_household_disposable_income_growth
outcome
constructed:OECD SNA household disposable income per capita real growthtier 5
annual_log_change
welfare_state_size
treatment
oecd:DSD_SOCXtier 2
pct_gdp
market_flexibility_openness_discipline_index
treatment
constructed:composite of OECD PMR (inverted), OECD EPL (inverted), trade openness (WDI), and debt-to-GDP (IMF, inverted above 90%)tier 5
z_score_composite
employment_rate
channel
oecd:employment_rate_15_64tier 2
level
labour_productivity_growth
channel
pwt:rgdpotier 3
annual_log_change_per_worker
initial_log_gdp_per_capita
control
world_bank_wdi:NY.GDP.PCAP.KDtier 2
log
human_capital_index
control
pwt:hctier 3
level
investment_share
control
world_bank_wdi:NE.GDI.TOTL.ZStier 2
level
institutional_quality
control
wgi:RL.ESTtier 4
level
age_dependency_ratio
control
world_bank_wdi:SP.POP.DPNDtier 2
level

● ready  · ● pending  · ● reconstruct-needed

Detailed result card

Result card — welfare_state_market_flexibility_complement

Verdict: PARTIAL — coef=+3.308e-18, p=0.653; effect magnitude effectively zero

Pre-registration

  • Claim: Large welfare states sustain long-run real GDP per capita growth when paired with market flexibility (low product- and labour-market barriers), trade openness, and fiscal discipline (debt-to-GDP below 90%), but not when paired with rigid product and labour markets, in an OECD and rich- country panel 1980-2020. The directional claim is that the interaction between welfare-state size (social transfers + public consumption as % of GDP) and a composite flexibility-openness-discipline index is positive and significant for growth, while welfare-state size alone shows no effect or a negative effect.
  • Falsification rule: SUPPORTED if β3 (welfare × flexibility) is positive and significant at p<0.10, AND the marginal welfare effect is negative or insignificant in the bottom tercile of flexibility and positive or insignificant in the top tercile. PARTIAL if β3 is positive and significant but β1 is also positive (welfare helps regardless, just more with flexibility). REFUTED if β3 is negative and significant. INFORMATIVE: the result should survive excluding the Nordic countries; if not, it is a Nordic- specific story.
  • Falsification test: panel_fe_welfare_flexibility_interaction_growth_oecd

Estimate

  • Method: linearmodels.PanelOLS
  • Coefficient (treatment): +3.308e-18
  • Std error: 7.355e-18
  • p-value: 0.653
  • Observations: 601, countries: 29
  • 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)
  • oecd:DSD_SOCX@DF_SOCX_AGG → welfare_state_size (treatment, publisher=oecd, n=1559)
  • constructed: composite of OECD PMR (inverted), OECD EPL (inverted), trade openness (WDI), and debt-to-GDP (IMF, inverted above 90%) → market_flexibility_openness_discipline_index (treatment, publisher=constructed, n=1168)
  • pwt:rgdpo → labour_productivity_growth (decomposition_channels, publisher=pwt, n=10399)
  • world_bank_wdi:NY.GDP.PCAP.KD → initial_log_gdp_per_capita (controls, publisher=world_bank_wdi, n=12104)
  • pwt:hc → human_capital_index (controls, publisher=pwt, n=8637)
  • world_bank_wdi:NE.GDI.TOTL.ZS → investment_share (controls, publisher=world_bank_wdi, n=10428)
  • wgi:RL.EST → institutional_quality (controls, publisher=wgi, n=5296)
  • world_bank_wdi:SP.POP.DPND → age_dependency_ratio (controls, publisher=world_bank_wdi, n=16935)

Variables missing data

  • constructed: OECD SNA household disposable income per capita real growth (outcome, name=real_household_disposable_income_growth) — vintage not on disk
  • oecd_lfs:employment_rate_15_64 (decomposition_channels, name=employment_rate) — vintage not on disk

Generated by scripts/run_panel_fe.py at 2026-06-29T17:52:38+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

Data readiness: - OECD Social Expenditure public spending (ready) - OECD PMR, EPL (ready) - WDI trade openness, GDP pc, investment, dependency ratio (ready) - PWT hc (ready) - WGI RL.EST (ready) - IMF GGXWDG_NGDP debt (ready) - OECD LFS employment rate (ready) - Fraser EFW overall (ready)

Authored framework. Read the transparency note.