Richard Burkhauser: Recent Trends in U.S. Top Income Shares in Tax Record Data Using More Comprehensive Measures of Income Including Accrued Capital Gains

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Jan Kabatek

j.kabatek@unimelb.edu.au

Melbourne Institute Brown Bag

Title: Recent Trends in U.S. Top Income Shares in Tax Record Data Using More Comprehensive Measures of Income Including Accrued Capital Gains

Abstract: Access to IRS personal income tax records improves researchers' ability to track U.S. income and inequality, especially at the very top of the distribution (Piketty and Saez 2003). However, rather than following standard Haig-Simons income definitions, tax form income measures were designed to implement the Internal Revenue Code. Using IRS tax record data since 1989 statistically matched to Survey of Consumer Finances and Census data for income sources not available in tax data, we explore the robustness of levels and trends in inequality using the top income literature's tax return market income definition (Saez 2016) to more comprehensive income measures. We find that focusing solely on market income misses the important redistributive effects of government taxes and transfers. In addition, we find that the use of taxable realized capital gains changes the level and trend in top incomes relative to an accrued capital gains measure that is more consistent with Haig-Simons income definitions.

Presenter: Richard Burkhauser, Melbourne Institute and Cornell University

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