Jul. 21, 2011 but still "current":
There is also the issue of reverse causality. Debt-to-GDP ratios tend to increase for countries that are in economic trouble. If this is part of the reason that higher debt-to-GDP ratios correspond to lower economic growth, there is less reason to think that countries should avoid a higher ratio, as Keynesian theory implies that fiscal austerity would undermine, rather than boost, economic performance.
The fundamental problem that much of the world faces today is that investors are overreacting to debt-to-GDP ratios, fearful of some magic threshold, and demanding fiscal-austerity programs too soon.
From: "Debt and Delusion," by Robert J. Shiller. Project Syndicate.
Robert J. Shiller is Professor of Economics at Yale University and the co-creator of the Case-Shiller Index of US house prices. He is the author of Irrational Exuberance, the second edition …