The debt episodes included everything from Netherlands’ Napoleonic War debts and the Japan banking crisis of the 1990s to Greece’s current fiscal crisis. On average, the researchers found that growth during these periods of high debt were 1.2 percent lower on average, consistent with Reinhart and Rogoff’s findings in 2010. What they also found, however, was these episodes of high debt and lower growth were quite lengthy, averaging 23 years. And the accompanying long-term drag on GDP was substantial. “By the end of the median episode, the level of output is nearly a quarter below that predicted by the trend in lower-debt periods,” they explain.