IESET.
Policies·uk_corporation_tax_reform_1984_1986

UK Corporation Tax Reform 1984-1986 (Lawson base-broadening)

GBR·1984 – 1986·Conservative majoritycandidate
movestax corporate↓tax capital↓

What the policy did

Budget 1984 (Lawson) reduced headline corporation tax from 52% to 35% phased over three years alongside the abolition of 100% first- year capital allowances and stock relief (broader base, lower rate). Seen retrospectively as a textbook supply-side tax-reform sequence. Subsequent Budget 1986 completed implementation.

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 corporate
fiscal.tax_corporate
Statutory and effective corporate tax rates, treatment of depreciation, and international competitiveness.
decreased · strong
lower corporate tax burden
Headline rate 52→35% with base broadening.
↓
tax capital
fiscal.tax_capital
Taxation of capital income (dividends, capital gains, inheritance, wealth). Distinct from corporate rate.
decreased · moderate
lower capital income tax
Reduced corporate tax burden on returns to capital.

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?".

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_corporate
SUPPORTED — coef=-0.1981 (sign matches claim -), p=0.00535
supported
Wealth taxes produce a three-order causal chain.
wealth_tax_capital_flight_revenue_yield_gapinferred
viafiscal.tax_capitalfiscal.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_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
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_corporatefiscal.tax_capital
INCONCLUSIVE_DATA_PENDING — insufficient pre-period coverage (years=1, donors=0)
run pending
Macron 2017-2019 labour-tax reforms produced measurable employment gains but had distributional costs; welfare-state-adjustment outcome is mixed and depends on transfer-side offsets.
macron_labour_tax_employment_distributioninferred
viafiscal.tax_corporatefiscal.tax_capital
PARTIAL - employment leg clears but disposable-income Gini does not rise by 0.005
partial
Trump's 2017 Tax Cuts and Jobs Act produced smaller investment and output responses than Laffer-curve advocates projected, consistent with New Keynesian estimates of corporate-tax-cut passthrough in a near-full-employment economy with inelastic long-run investment supply.
tcja_2017_growth_effectinferred
viafiscal.tax_corporatefiscal.tax_capital
WEAKENED — GDP gate clears at 0.97pp and PNFI is -3.73% below pretrend; EMTR-elasticity gate not loaded
refuted
Lower statutory corporate tax rates predict higher business investment and faster capital deepening, with larger effects in open economies.
corporate_tax_rate_investment_elasticityinferred
viafiscal.tax_corporatefiscal.tax_capital
PARTIAL — coef=-5.758e-16, p=7.77e-06; effect magnitude effectively zero
partial
The 2003 Jobs and Growth Tax Relief Reconciliation Act (JGTRRA), which cut US qualified-dividend and long-term-capital-gains rates to 15 percent, shifted the composition of top-1 pre-tax income toward dividend and capital-gains realisations between 2003 and 2007, raising the top-1 share by 1.5 to 3 percentage points relative to the pre-2003 trend.
tax_inequality_bush_2003_dividend_capgains_cutinferred
viafiscal.tax_capital
PARTIAL — shape=ITS, opposite sign but small (mean_gap=-0.6187, z=-1)
partial

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.

Finnish dual-income tax reform 1993
FIN·1993
match
1.7
tax capitaltax corporate
19 percent flat tax (PIT/CIT/VAT) 2004
SVK·2004
match
1.7
tax corporatetax capital
Macron labour + tax reforms (Ordonnances 2017 + PFU 2018)
FRA·2017
match
1.5
tax capitaltax corporate
Norwegian 1992 tax reform — base broadening and dual-income
NOR·1992
match
1.5
tax corporatetax capital
Swedish 'Tax Reform of the Century' 1990-1991
SWE·1990
match
1.5
tax corporatetax capital
Economic Recovery Tax Act 1981 + Tax Reform Act 1986
USA·1981
match
1.5
tax corporatetax capital
Greece corporate income tax cut 28% to 22% 2019-2021
GRC·2019
match
1.4
tax corporatetax capital
Finnish corporate-tax cut to 20 percent 2014
FIN·2014
match
1.3
tax corporatetax capital