Correlation among income tax rate, tax receipts, and GDP

By Hao Li: Subscribe to Hao's

August 30, 2010 8:01 PM EDT

An analysis of the correlation among U.S. personal income tax rate, tax receipts, and the gross domestic product (GDP) reveals a high correlation between GDP and tax receipts. However, other correlations among the three data series are noticeably weaker.

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To download the Microsoft Excel file of the analysis and data used, click here.

Background

 

There is a fierce debate in Washington over the expiration of the Bush tax cuts. If these tax cuts are allowed to cease, then personal income tax would increase in 2011. Some want all of them to expire, others want all of them extended, and those in the middle, including the Obama administration, want to extend only some tax cuts.

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Proponents of keeping the tax cuts say tax hikes are anti-growth. One argument is that given the fragile state of the economic recovery, it is unwise to raise taxes. Others in this camp believe the way to reduce the ballooning U.S. debt is to foster economic growth through tax cuts. Economic growth would then result in higher tax revenues, which would in turn reduce the deficit.

 

Proponents of letting the income tax cuts expire – thus raising income taxes for 2011 – argue that U.S. debt is too high. To raise tax revenues, they advocate raising the income tax rate. Some in this camp point out that many of Bush's income tax cuts benefit the rich. Therefore, some advocate raising income taxes for only the top two tax brackets.

 

Findings From Analysis

 

U.S. tax receipts is highly correlated to GDP growth. However, the correlation among income tax rate and tax receipts is much weaker. So the best way to raise tax revenues is probably through fostering economic growth.

 

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