Lessons for International Tax Reform from the U.S. State Experience under Formulary Apportionment
Kimberly A. Clausing
Reed College - Department of Economics
June 29, 2014
This work undertakes a comprehensive analysis of the U.S. state experience under formulary apportionment of corporate income. While formulary apportionment eliminates the possibility of shifting income across states through accounting strategies that manipulate where income is booked, it may heighten the tax responsiveness of formula factors. The present analysis uses the substantial variation in corporate tax policy decisions of U.S. states over the period 1986 to 2012 to better understand the consequences of formulary apportionment. It examines the effects of policy choices regarding tax rates, formula weights, and other parameters on economic activity, estimating the tax sensitivity of employment, investment, and sales. With the inclusion of adequate control variables, results indicate that economic activity is not particularly sensitive to U.S. state corporate tax policy choices, especially in recent years. Still, tax policy choices have important effects on corporate tax revenues. These results suggest important lessons regarding possible international adoption of formulary apportionment.
Number of Pages in PDF File: 42
Keywords: corporate income taxation, corporate income tax revenues, tax competition, formulary apportionment, international taxation, unitary taxation, income shifting, state taxation, multinational corporations
JEL Classification: H25, H87
Date posted: November 26, 2013 ; Last revised: June 30, 2014
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