Sep 13, 2012 Calculating debt as a percentage of GDP BY Eliza Keller (Originally published on March 19, 2010) Among the multiple data sets we’ve been collecting for our poster History of the American Presidency, I’ve been working on researching various economic data points. For the past couple days, I’ve been trying to find a good measure of U.S. debt (public, private, or both) as a percentage of GDP over time. The following article gives a pretty good explanation of why the data is so complex, and why it’s taking a bit longer than originally planned to find consistent numbers: http://www.businessinsider.com/2009/2/us-debt-levels-are-fine-debt-to-gdp-chart-is-wrong-and-meaningless Comments, ideas are welcomed!