New paper exposes several fundamental problems with the Piketty-Saez data on income inequality in the United States

From Cafe Hayek.

"Writing in yesterday’s Wall Street Jounal, Phil Gramm and Michael Solon summarize the findings of the important new paper, in the current issue of the Southern Economic Journal, by Philip Armour, Richard V. Burkhauser, and Jeffrey Larrimore - a paper that exposes several fundamental problems with the Piketty-Saez data on income inequality in the United States.  Some slices from Gramm and Solon:

And now, thanks to a new study in the Southern Economic Journal, we know what the picture looks like when the missing data are filled in. Economists Philip Armour and Richard V. Burkhauser of Cornell University and Jeff Larrimore of Congress’s Joint Committee on Taxation expanded the Piketty-Saez income measure using census data to account for all public and private in-kind benefits, taxes, Social Security payments and household size.

The result is dramatic. The bottom quintile of Americans experienced a 31% increase in income from 1979 to 2007 instead of a 33% decline that is found using a Piketty-Saez market-income measure alone. The income of the second quintile, often referred to as the working class, rose by 32%, not 0.7%. The income of the middle quintile, America’s middle class, increased by 37%, not 2.2%.

By omitting Social Security, Medicare and Medicaid, the Piketty-Saez study renders most older Americans poor when in reality most have above-average incomes. The exclusion of benefits like employer-provided health insurance, retirement benefits (except when actually paid out in retirement) and capital gains on homes misses much of the income and wealth of middle- and upper-middle income families.
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Yes, income is 24% less equally distributed here than in the average of the other 34 member countries of the OECD. But OECD figures show that U.S. per capita GDP is 42% higher, household wealth is 210% higher and median disposable income is 42% higher. How many Americans would give up 42% of their income to see the rich get less?

Vast new fortunes were earned in the 25-year boom that began under Reagan and continued under Clinton. But the income of middle-class Americans rose significantly. These incomes have fallen during the Obama presidency, and not because the rich have gotten richer. They’ve fallen because bad federal policies have yielded the weakest recovery in the postwar history of America.

Yet even as the recovery continues to disappoint, the president increasingly turns to the politics of envy by demanding that the rich pay their “fair share.” The politics of envy may work here as it has worked so often in Latin America and Europe, but the economics of envy is failing in America as it has failed everywhere else."