IESET.
Policies·us_reagan_tax_reform_1981

Economic Recovery Tax Act 1981 + Tax Reform Act 1986

USA·1981 – 1986·enacted 1981-08-13·Republican administration + bipartisan Senate supportcandidate
movestax progressivity↓tax corporate↓tax capital↓

What the policy did

Two-stage supply-side tax reform. ERTA 1981 cut top marginal individual income tax from 70% to 50% (phased), introduced accelerated depreciation, and indexed brackets. TRA 1986 further cut the top rate to 28%, broadened the base by eliminating many deductions, and reduced corporate rate from 46% to 34%. Accompanied by Volcker disinflation and substantial regulatory retrenchment. Credited by proponents with the 1983-1989 recovery and sustained subsequent growth; critics attribute outcomes more to monetary normalisation post-Volcker.

Policy-content fingerprint — what this policy moved, on which axes

Per invariant 3, reforms are scored by what they did on each channel-separated axis, not by the party that enacted them. This fingerprint is how the policy-match engine finds historical analogues.

intended
↓
tax progressivity
fiscal.tax_progressivity
Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).
decreased · strong
less progressive (flatter rates, compression, smaller credits)
Top marginal rate cut 70% → 28% over 5 years; supply-side framing.
↓
tax corporate
fiscal.tax_corporate
Statutory and effective corporate tax rates, treatment of depreciation, and international competitiveness.
decreased · moderate
lower corporate tax burden
↓
tax capital
fiscal.tax_capital
Taxation of capital income (dividends, capital gains, inheritance, wealth). Distinct from corporate rate.
decreased · moderate
lower capital income tax

Enacted by

Empirical evidence — linked hypotheses

Explicit links are curated by the author. Inferred links are hypotheses in the library that test the same axes this policy moved — the framework's answer to "what does the data say about a policy like this?".

US GDP per capita (PPP, constant $) exceeds the EU15 weighted average by approximately 50% as of 2023, with the gap widening from ~20% in 2000 after converging during 1980-1995.
us_eu_gdp_per_capita_divergence_policy_causes
PARTIAL — coef=+0.1801, p=0.565 (above α=0.1); direction inconclusive
partial
Wealth taxes produce a three-order causal chain.
wealth_tax_capital_flight_revenue_yield_gapinferred
viafiscal.tax_capitalfiscal.tax_progressivityfiscal.tax_corporate
INCONCLUSIVE_DATA_PENDING — FRA not in panel
run pending
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.
tax_inequality_germany_2000_schroder_reforminferred
viafiscal.tax_progressivityfiscal.tax_corporatefiscal.tax_capital
PARTIAL — mean_gap=+0.3903, |gap|/pre_sd=0.43, p_perm=0.4 (gap below 0.5×pre_sd or placebo p≥0.10)
partial
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.
capital_gains_tax_cut_investment_response_panelinferred
viafiscal.tax_capitalfiscal.tax_corporatefiscal.tax_progressivity
SUPPORTED — coef=-0.1981 (sign matches claim -), p=0.00535
supported
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.
tax_inequality_chile_post_pinochet_progressivityinferred
viafiscal.tax_progressivityfiscal.tax_capitalfiscal.tax_corporate
INCONCLUSIVE_DATA_PENDING — insufficient pre-period coverage (years=0, donors=0)
run pending
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.
tax_inequality_estonia_1994_flat_tax_dividend_reforminferred
viafiscal.tax_progressivityfiscal.tax_corporatefiscal.tax_capital
INCONCLUSIVE_DATA_PENDING — insufficient pre-period coverage (years=1, donors=0)
run pending
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.
tax_inequality_south_africa_property_tax_burdeninferred
viafiscal.tax_progressivityfiscal.tax_capital
INCONCLUSIVE_DATA_PENDING — insufficient pre-period coverage (years=5, donors=0)
run pending
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.
tax_inequality_france_2017_isf_to_ifi_abolitioninferred
viafiscal.tax_capitalfiscal.tax_progressivity
PARTIAL — mean_gap=+1.331, |gap|/pre_sd=2.2, p_perm=1 (gap below 0.5×pre_sd or placebo p≥0.10)
partial
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.
tax_inequality_reagan_1986_base_broadening_neutralityinferred
viafiscal.tax_capitalfiscal.tax_progressivity
REFUTED — shape=ITS, sign + OPPOSITE claim -, mean_gap=+1.194, z=+3.4
refuted

Similar historical policies

Ranked by axis-fingerprint overlap with this policy. Direction match bolded — those are the closest historical analogues. Shape of the match is what drives policy-outcome comparison, not the country or party label.

19 percent flat tax (PIT/CIT/VAT) 2004
SVK·2004
match
2.5
tax progressivitytax corporatetax capital
Swedish 'Tax Reform of the Century' 1990-1991
SWE·1990
match
2.4
tax progressivitytax corporatetax capital
Macron labour + tax reforms (Ordonnances 2017 + PFU 2018)
FRA·2017
match
2.3
tax progressivitytax capitaltax corporate
Norwegian 1992 tax reform — base broadening and dual-income
NOR·1992
match
2.3
tax corporatetax progressivitytax capital
Bush 43 tax cuts (EGTRRA 2001 + JGTRRA 2003)
USA·2001
match
2.1
tax progressivitytax capitaltax corporate
Tax Reform Act of 1986 (TRA 1986)
USA·1986
match
2.0
tax progressivitytax corporatetax capital
Gotabaya Rajapaksa tax cut package (Sri Lanka 2019)
LKA·2019
match
1.9
tax progressivitytax corporate
France Corporate Tax Reduction 2018 2022
FRA·2017
match
1.8
tax progressivitytax capitaltax corporate