ITO Research Roundup



ITO Research Roundup

Weekly summaries of recent studies and posts relevant for our work

Brought to you by Matt and Claude Code

📅 July 22, 2026

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Multinational Taxation

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Tax Evasion & Administration

  • India’s 2017 GST, by granting input tax credits only for purchases from registered suppliers, drove formalization cascades upstream over five years, as large firms’ share of national GST collections fell from 46% to 30% and smaller enterprises entered the tax net. [SSRN 6213439 | PDF]
  • Across Brazil, Colombia, Mexico, and Peru informality is an active response to fiscal incentives, and in a Mexico calibration the welfare-maximizing degree of income-tax progressivity is about five times the current near-flat level. [PDF]
  • Retaliatory tariffs in the 2018 trade war cut compliance by 25 percentage points—each one-point tariff hike lowers compliance 1 to 2 points—costing roughly $3.5 billion in foregone tariff revenue in 2019. [CESifo WP 12643 | PDF]
  • After automatic bank-information exchange took hold, Norwegians who grew wealthy became far less likely to shift money offshore, and the 7% tax-payment drop that once accompanied offshore transfers fell to under 1%. [NBER WP 35505 | PDF]
  • Brazil’s 2023 VAT reform spreads the tax burden more evenly, but approved reduced rates aggravate regressivity while expanding the cashback could raise the poorest’s disposable income by 25%. [IMF WP 26/132 | PDF]
  • A randomized trial with 3,551 Ethiopian business owners found letters stressing tax obligations raised reported profit tax declarations, but the effect did not differ between male and female owners at either the intensive or extensive margin. [World Bank WP 11409 | PDF]
  • Automatic bank information exchange roughly doubled South Africans’ self-reported foreign income, yet around half stays hidden because the detection risk from non-compliance stayed modest—about a 1 percentage-point excess audit risk for the average account holder. [Oxford CBT WP 2026-02 | PDF]
  • A randomized experiment with 1,006 married Japanese women near the 1.03 million yen earnings threshold found tax information raised stated planned earnings by 0.9% and intent to cross the threshold by 4.3%, yet produced no change in actual labor supply a year later. [TUPD 2026-009 | PDF]

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Illicit Financial Flows & Real Estate

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Tax & Environment

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Wealth Taxation

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Other Tax

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Methods

  • A new axiomatically-derived inequality measure equal to the expected income ratio between two random individuals shows global inequality fell from about 5 in 1990 to 3.8 in 2024 as between-country gaps narrowed, while US inequality rose through widening within-state gaps.[Journal of Development Economics 2026 | PDF]
  • A new switcher difference-in-differences estimator shows Finland’s size-based payroll tax notch cut treated firms’ employment, capital, and value added by about 10 percent and left 18 percent fewer firms above the threshold, effects conventional DiD misses entirely. [NBER WP 35484 | PDF]

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Other Economics

📅 June 15, 2026

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Multinational Taxation

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Tax Evasion & Administration

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Illicit Financial Flows & Real Estate

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Tax & Environment

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Other Tax

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Methods

📅 June 01, 2026

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Tax Evasion & Administration

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Illicit Financial Flows & Real Estate

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Tax & Environment

  • Japan’s fuel-economy subsidy improved the fuel economy of vehicles sold in the US by 8.65%, so most of its CO2 reductions occur abroad through multinational “attribute propagation.”[PDF]
  • China’s waste-import ban improved air and water quality but triggered a surge in smuggling, leaving a net welfare loss of $25.65 per tonne as environmental gains were offset by evasion and distortion costs. [CEP DP 2181 | PDF]

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Wealth Taxation

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Other Tax

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Methods

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Other Economics

📅 May 11, 2026

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Multinational Taxation

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Tax Evasion & Administration

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Wealth Taxation

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Other Tax

📅 May 04, 2026

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Tax Evasion & Administration

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Illicit Financial Flows & Real Estate

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Other Tax

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Methods

📅 April 27, 2026

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Multinational Taxation

🔍

Tax Evasion & Administration

  • Randomly providing property tax education to Ghanaian taxpayers and officials raises knowledge and spreads through neighbour conversations, but ultimately has no impact on tax payments as taxpayers revise enforcement-capacity beliefs downward and learn legal ways to reduce their burden. [PDF]
  • After tax evasion was publicly blamed for the 2010 Greek fiscal collapse and judges saw their salaries cut, the Supreme Court’s rejection rate for tax-evasion appeals rose 25 percentage points (a 43% jump) relative to homicide and rape appeals, with effects strongest in months of high public salience. [IZA DP 18489 | PDF]

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Illicit Financial Flows & Real Estate

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Other Tax

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Other Economics

📅 April 13, 2026

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Multinational Taxation

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Tax Evasion & Administration

💸

Illicit Financial Flows & Real Estate

🌿

Tax & Environment

💎

Wealth Taxation

📊

Other Tax

🔧

Methods

📌

Other Economics

📅 March 30, 2026

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Multinational Taxation

🔍

Tax Evasion & Administration

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Other Economics

📅 March 23, 2026

🏢

Multinational Taxation

🔍

Tax Evasion & Administration

📅 March 16, 2026

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Tax Evasion & Administration

  • A randomized controlled trial in Gorontalo, Indonesia finds that soft-tone WhatsApp nudges emphasizing civic duty raised property tax compliance by 9.9 percentage points, with effects driven entirely by historically poor compliers and persisting six months after the intervention. [World Bank WP 11320 | PDF]
  • Georgia’s 2021 Large Taxpayer Office raised annual tax assessments by 0.4–0.7% of GDP, concentrated in VAT and withholding taxes, by combining targeted enforcement with improved taxpayer services while making audits fewer but more selective. [IMF WP 26/31 | PDF]
  • Using linked administrative tax records and a tailored survey of Uruguayan taxpayers, peer behavior is the strongest predictor of tax evasion, with economic factors also mattering, while social preferences (honesty, tax morale) have little predictive power. [IZA DP 18387 | PDF]

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Methods

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Other Economics

📅 March 09, 2026

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Multinational Taxation

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Tax Evasion & Administration

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Tax & Environment

💎

Wealth Taxation

📊

Other Tax

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Methods

📅 February 23, 2026

🏢

Multinational Taxation

🔍

Tax Evasion & Administration

💎

Wealth Taxation

📊

Other Tax

🔧

Methods

📅 February 09, 2026

🏢

Multinational Taxation

🔍

Tax Evasion & Administration

💸

Illicit Financial Flows & Real Estate

🌿

Tax & Environment

💎

Wealth Taxation

📊

Other Tax

Generated 2026-07-22 15:12