Pre-registration
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.
Falsification criterion — what would disprove this
This hypothesis is considered falsified if:
Refuted on the poverty arm if the synth-DiD ATT on extreme-poverty rate at 20-year horizon is below minus-3pp (i.e., reduction less than 3pp), OR placebo p > 0.10. Refuted on the employment arm if the employment-rate ATT exceeds plus or minus 1pp at 20-year horizon (i.e., a non-null employment effect would refute the joint pattern).
formal test & threshold
test: synth_did_20yr_paired_poverty_employment threshold: poverty_att <= -3pp AND abs(employment_att) <= 1pp AND placebo_p < 0.10
Method
- Template
synth_did- Fixed effects
state, year- Clustering
state- Sample
- 1 countries · 1980 – 2023
- Evidence type
- causal
Synthetic-DiD on AK with WY, ND, TX, LA donor pool 1980-2023. Pre-treatment fit 1980-1981. Long-run trajectory 1982-2023 with post-period heterogeneity by oil-cycle phases.
Data
| Variable | Source | Transform |
|---|---|---|
extreme_poverty_rate_state outcome | world_bank_wdi:SI.POV.DDAYtier 2 | level_pct |
employment_rate_working_age outcome | bls:LNS11300000tier 1 | level_pct |
in_migration_rate outcome | world_bank_wdi:SP.URB.TOTL.IN.ZStier 2 | level |
pfd_indicator treatment | world_bank_wdi:SI.POV.DDAYtier 2 | indicator |
oil_terms_of_trade control | world_bank_wdi:TT.PRI.MRCH.XD.WDtier 2 | log |
gdp_per_capita_real control | world_bank_wdi:NY.GDP.PCAP.KDtier 2 | log |
● ready · ● pending · ● reconstruct-needed
Detailed result card
Result card — welfare_transfer_alaska_permanent_fund_dividend_long_run
Verdict: PARTIAL — ATT=-0.2013, p=nan, N=44, treated_countries=1 (above α=0.10)
Pre-registration
- Claim: 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.
- Falsification rule: Refuted on the poverty arm if the synth-DiD ATT on extreme-poverty rate at 20-year horizon is below minus-3pp (i.e., reduction less than 3pp), OR placebo p > 0.10. Refuted on the employment arm if the employment-rate ATT exceeds plus or minus 1pp at 20-year horizon (i.e., a non-null employment effect would refute the joint pattern).
Estimate (Callaway-Sant'Anna staggered DiD, TWFE approximation)
- coefficient: -0.20128550083819977
- std_error: nan
- p_value: nan
- n_obs: 44
- n_countries: 1
- r_squared_within: 1.0
- fe_entity: True
- fe_time: True
- cluster: country
- method: Callaway-Sant'Anna TWFE fallback (linearmodels failed: No module named 'linearmodels')
- n_treated_countries: 1
- cohort_years: [1980]
- dropped_controls_due_to_overlap: []
Variables resolved
world_bank_wdi:SI.POV.DDAY→ extreme_poverty_rate_state (outcome, n=2862)bls:LNS11300000→ employment_rate_working_age (outcome, n=3)world_bank_wdi:SP.URB.TOTL.IN.ZS→ in_migration_rate (outcome, n=16965)world_bank_wdi:SI.POV.DDAY→ pfd_indicator (treatment, n=2862)world_bank_wdi:TT.PRI.MRCH.XD.WD→ oil_terms_of_trade (controls, n=6478)world_bank_wdi:NY.GDP.PCAP.KD→ gdp_per_capita_real (controls, n=14066)
Generated by scripts/run_did_callaway_santanna.py at 2026-04-30T10:49:03+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.