The question of what is a sustainable public debt is paramount in the macroeconomic analysis of fiscal policy. This question is usually formulated as asking whether the outstanding public debt and its projected path are consistent with those of the government's revenues and expenditures (i.e....

This note looks at US$ and DM/Euro denominated government bond spreads relative to US and German benchmark bonds before and after the start of the current financial crisis. The study finds, first, that bond yield spreads before and during the crisis can largely be explained on the basis of...