Policies·us_tcja_salt_cap_2017

Tcja Salt Cap 2017

USA·2017 – 2025candidate

movestax corporate↓tax progressivity↓trade openness—

What the policy did

The Tax Cuts and Jobs Act (TCJA) of 2017 capped the federal itemised deduction for state and local taxes (SALT) at $10,000 per return, encompassing combined property, income, and sales taxes. The cap raised effective federal tax burdens on high-income filers in high-tax jurisdictions and partially offset revenue loss from broader bracket cuts. The provision was structured as a temporary 2018-2025 measure consistent with reconciliation budget rules.

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 · weak

lower corporate tax burden

Cap was bundled within TCJA package whose net effect lowered total corporate-related federal liabilities.

↓

tax progressivity

fiscal.tax_progressivity

Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).

decreased · weak

less progressive (flatter rates, compression, smaller credits)

SALT cap raised tax burden on high-income filers in high-tax states, partially offsetting regressive bracket cuts.

—

trade openness

regulatory.trade_openness

Trade policy openness — tariffs, non-tariff barriers, FTAs, industrial protection.

unchanged · weak

SALT cap is a domestic federalism provision with no cross-border or trade-policy mechanism.

Enacted by

us_trump_tcja_2017

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?".

Estonia adopted among the most radical market-liberalisation packages of any post-Soviet state — flat tax (26% universal rate, 1994), currency board (EEK pegged to DM/EUR, 1992), rapid privatisation, unilateral free trade, and minimal capital controls — and by 2007 had recovered to Soviet-era GDP per capita levels and substantially exceeded them, while Belarusian and Ukrainian peers had not recovered comparably.

estonia_market_reform_post_soviet_growth_1991_2007inferred

viaregulatory.trade_openness

PARTIAL — recovery threshold pass=True (year_recovered=1998, 2007 vs 1991 = 70.53282727739165); Baltic−CIS gap pass=False (gap=5.1509956229348575)

partial

Canada’s long-run prosperity after the Canada–US Free Trade Agreement (1988) and NAFTA (1994) is more associated with market openness than with national industrial-policy initiatives.

canada_market_liberalisation_vs_state_industry_1988_2024inferred

viaregulatory.trade_openness

INCONCLUSIVE_DATA_PENDING — treatment 'canada_post_1988' has no within-country variation under country fixed effects

run pending

Singapore's long-run prosperity and frontier convergence are better predicted by extreme trade openness, strong rule of law, competitive product and services markets, and high economic freedom than by state ownership or industrial targeting alone.

singapore_state_capacity_market_openness_comboinferred

viaregulatory.trade_openness

PARTIAL — coef=-0.0001143, p=0.713 (above α=0.1); direction inconclusive

partial

Ireland’s long-run convergence from a middle-income to a high-income economy during 1987–2024 is better predicted by trade openness, tax competitiveness, and FDI entry than by classic industrial planning.

ireland_market_opening_fdi_frontier_1987_2024inferred

viaregulatory.trade_opennessfiscal.tax_corporate

supported

The ASEAN-China Free Trade Area (ACFTA), with the goods agreement effective 2010-01-01 for the original ASEAN-6, raised ASEAN-6 merchandise-export intensity over the 2010-2019 window relative to non-ASEAN comparator economies.

trade_lib_acfta_asean_china_2010_export_growthinferred

viaregulatory.trade_openness

PARTIAL — ATT=+3.31, p=0.324, N=295, treated_countries=1 (above α=0.10)

partial

Conditional on latest real GDP per capita and broad Heritage region, countries with higher Heritage lower-tax-burden score in 2024 have higher latest-available trade openness.

heritage_tax_burden_trade_openness_income_region_robustnessinferred

viaregulatory.trade_opennessfiscal.tax_progressivityfiscal.tax_corporate

SUPPORTED — controlled market-score coefficient has expected sign + and p=0.01898

supported

Global value chain (GVC) participation predicts real GDP per capita income upgrading when firms can enter and exit freely, but not when rents are reserved for protected incumbents, in a panel of developing and emerging economies 1990-2020.

global_value_chain_participation_upgradeinferred

viaregulatory.trade_openness

INCONCLUSIVE_DATA_PENDING — insufficient observations after listwise deletion (22)

run pending

Across countries 1990-2020, accession to a substantive free-trade agreement (FTA) — defined as a WTO-notified preferential-trade agreement going beyond MFN with measurable bilateral tariff reductions — is followed by higher trade openness and higher per-capita real GDP growth in the post-accession 5-year window than in the matched pre-accession 5-year window.

liberal_free_trade_partner_growth_panel_1990_2020inferred

viaregulatory.trade_openness

PARTIAL — ATT=-4.069, p=0.264, N=1342, treated_countries=61 (above α=0.10)

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.

Gotabaya Rajapaksa tax cut package (Sri Lanka 2019)

LKA·2019

match

1.4

tax progressivitytax corporate

19 percent flat tax (PIT/CIT/VAT) 2004

SVK·2004

match

1.4

tax progressivitytax corporate

Goods and Services Tax introduction

AUS·2000