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1 William McBride, Reversal of the Trend: Income Inequality Now Lower than It Was under Clinton 1 (2012)

handle is hein.taxfoundation/ffcijxz0001 and id is 1 raw text is: OR
FOUNDA:ION
January 30, 2012
No. 289
Reversal of the Trend: Income Inequality
Now Lower than It Was under Clinton
By
William McBride
Introduction
Numerous academic studies have shown that income inequality in the U.S. over the 20,h century exhibits a U-
shape. After reaching a peak in the 1920s, it fell during the Great Depression and World War II and rebounded
mainly in the 1980s and 1990s.' The rebound has been attributed to various economic factors, such as the
computer revolution, globalization, and increased migration of both low- and high-skilled workers. However,
these factors might better be described as the normal outcomes of a growing economy, according to Adam
Smith's idea that the division of labor is limited by the extent of the market. The resurgence of inequality has
also been attributed to tax policy, particularly the reduction of top marginal rates on personal income from 94
percent in 1945 to 28 percent in 1988.2
The first decade of the 21st century does not exhibit the same trend. Based on the most recent IRS data, from
2009, income inequality has fluctuated considerably since 2000 but is now at about the level it was in 1997.
Thus, the Bush-era tax cuts (which had provisions benefitting both high- and low-income taxpayers) did not lead
to increased income inequality. By contrast, inequality rose 12 percent between 1993 and 2000, following two
William McBride is an economist at the Tax Foundation.
1 See for example the following:
Daniel Feenberg and James Poterba, The Income and Tax Share of Very High Income Households, 1960 - 1995,
American Economic Review, May 2000.
Thomas Piketty and Emmanuel Saez, Income Inequality in the United States, 1913-1998, The Quarterly Journal of
Economics, February 2003. Data updated to 2008 here: htie    --sam'
Anthony Atkinson, Thomas Piketty, and Emmanuel Saez, Top Incomes in the Long Run of History, Journal of Economic
Literature, March 2011.
2 History of rates here: http://taxfouidation-.or6/taxda[a/show/i 51 .html

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