IESET.
Hypotheses·growth·price_controls_food_output_decline_panel

Countries maintaining long-lived food price controls or state procurement show slower agricultural value-added growth than market-priced peers.

SUPPORTEDengine/runs/price_controls_food_output_decline_panel

SUPPORTED — coef=-0.4196 (sign matches claim -), p=0.00206

confidence cueThis is a clear pass for the claim as written. It still applies only to this sample, period, and method.

policy briefNeeds review

In ordinary language

Over a long period, do more market-oriented institutions translate into higher income or productivity, once the comparison looks beyond a single success story?

plain answer

The data clearly moved in the predicted direction. coef=-0.4196 (sign matches claim -), p=0.00206

why it matters

Growth claims can look convincing in single success stories. This test asks whether the pattern survives a broader comparison.

how the test works

It compares 30 country or place units from 1970 to 2023, using a panel fe design, with fixed effects for country and year.

what was measured
What changed
  • Policy or institution proxy
What we checked
  • Primary sectoral outcome
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

No evidence packet has been generated yet.

Results

engine/runs/price_controls_food_output_decline_panel
1007550250197019972023USAGBRCANAUSNZLDEUFRA
illustrative sketch · run pending
No coefficients yet. When the model fires, this chart will show primary_sectoral_outcome across 30 sampled countries over 1970–2023.
The shapes above are stylised — none of the lines are real data.
Placeholder for price_controls_food_output_decline_panel. Published chart will be generated from engine/runs/price_controls_food_output_decline_panel/chart_data.json.

Who has skin in the game — schools predicting on this

4 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.

Austrian Business Cycle Theory (ABCT)wins if SUPPORTEDschool supportedChicago School Monetarismwins if SUPPORTEDschool supportedClassical Liberalwins if SUPPORTEDschool supportedOrdoliberalism (Freiburg School)wins if SUPPORTEDschool supported

Pre-registration

registration ordering unverified
first-spec commit 4c8ce8e · 2026-07-18T22:11:21Z
run generated · 2026-06-29T17:52:59Z
Run timestamp predates this path's first git-add commit (rebase, rename, or pre-git local run). Spec hash is still the path's first-add commit — not repository HEAD — but ordering is not a clean pre-registration proof.

Countries maintaining long-lived food price controls or state procurement show slower agricultural value-added growth than market-priced peers.

Falsification criterion — what would disprove this

set before the run · honoured after

This hypothesis is considered falsified if:

SUPPORTED if the treatment coefficient has the predicted sign at p<0.10. REFUTED if the opposite sign is significant at p<0.10. Otherwise PARTIAL.

formal test & threshold
test:      panel_fe_price_controls_food_output_decline_panel
threshold: p<0.10 with pre-registered sign

Method

Template
panel_fe
Fixed effects
country, year
Clustering
country
Sample
30 countries · 1970 – 2023
Evidence type
associational

Proxy-first TWFE screen; upgrade to bespoke replication when exact sector datasets are fetched.

Data

VariableSourceTransform
primary_sectoral_outcome
outcome
world_bank_wdi:NV.AGR.TOTL.ZStier 2
level_or_growth_proxy
policy_or_institution_proxy
treatment
constructed:1 for ARG from 2006 onward; ZWE from 2000 onward; ZMB from 1980 onwardtier 5
indicator_or_level
log_gdp_pc
control
world_bank_wdi:NY.GDP.PCAP.KDtier 2
log
rule_of_law
control
wgi:RL.ESTtier 4
level

● ready  · ● pending  · ● reconstruct-needed

Detailed result card

Result card — price_controls_food_output_decline_panel

Verdict: SUPPORTED — coef=-0.4196 (sign matches claim -), p=0.00206

Pre-registration

  • Claim: Countries maintaining long-lived food price controls or state procurement show slower agricultural value-added growth than market-priced peers.
  • Falsification rule: SUPPORTED if the treatment coefficient has the predicted sign at p<0.10. REFUTED if the opposite sign is significant at p<0.10. Otherwise PARTIAL.
  • Falsification test: panel_fe_price_controls_food_output_decline_panel

Estimate

  • Method: linearmodels.PanelOLS
  • Coefficient (treatment): -0.4196
  • Std error: 0.1355
  • p-value: 0.00206
  • Observations: 571, countries: 23
  • Within R²: 0.562
  • Fixed effects: entity=True, time=True
  • Clustering: country

Variables resolved

  • world_bank_wdi:NV.AGR.TOTL.ZS → primary_sectoral_outcome (outcome, publisher=world_bank_wdi, n=10968)
  • constructed: 1 for ARG from 2006 onward; ZWE from 2000 onward; ZMB from 1980 onward → policy_or_institution_proxy (treatment, publisher=constructed, n=1620)
  • world_bank_wdi:NY.GDP.PCAP.KD → log_gdp_pc (controls, publisher=world_bank_wdi, n=12104)
  • wgi:RL.EST → rule_of_law (controls, publisher=wgi, n=5296)

Generated by scripts/run_panel_fe.py at 2026-06-29T17:52:59+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.

Authored framework. Read the transparency note.