T The recent fi nancial crisis and recession has left a legacy of historically high he recent fi nancial crisis and recession has left a legacy of historically high and rising level of public indebtedness across the advanced economies. and rising level of public indebtedness across the advanced economies. The central policy debate across Europe, Japan, and the United States now The central policy debate across Europe, Japan, and the United States now centers on how fast to stabilize soaring public debt/GDP ratios, given that post-crisis centers on how fast to stabilize soaring public debt/GDP ratios, given that post-crisis growth remains fragile. We bring evidence to bear on the issue by identifying the growth remains fragile. We bring evidence to bear on the issue by identifying the major public debt overhang episodes in advanced economies since the early 1800s. major public debt overhang episodes in advanced economies since the early 1800s. Following Reinhart and Rogoff (2010), we select stretches where gross public debt Following Reinhart and Rogoff (2010), we select stretches where gross public debt exceeds 90 percent of nominal GDP on a sustained basis. Such public debt overhang exceeds 90 percent of nominal GDP on a sustained basis. Such public debt overhang episodes are associated with lower growth than during other periods. Even more episodes are associated with lower growth than during other periods. Even more striking, among the 26 episodes we identify, 20 lasted more than a decade. The long striking, among the 26 episodes we identify, 20 lasted more than a decade. The long duration belies the view that the correlation is caused mainly by debt buildups during duration belies the view that the correlation is caused mainly by debt buildups during business cycle recessions. The long duration also implies that the cumulative shortfall business cycle recessions. The long duration also implies that the cumulative shortfall in output from debt overhang is potentially massive. These growth-reducing effects of in output from debt overhang is potentially massive. These growth-reducing effects of high public debt are apparently not transmitted exclusively through high real interest high public debt are apparently not transmitted exclusively through high real interest rates, in that in eleven of the episodes, interest rates are not materially higher. rates, in that in eleven of the episodes, interest rates are not materially higher.