There has been considerable debate on the impact of high public debt on economic growth. The authors of This Time Is Different, economists Carmen Reinhart and Ken Rogoff claim that there exists a “debt overhang”—a level of public debt beyond which economic growth is negatively affected by excessive government borrowing, though many other economists disagree. Using the OECD database, find the latest data on GDP growth and the level of public debt for Japan, the United States, and Germany. What do these numbers tell you about the “debt overhang” argument?