Kenneth Rogoff is Thomas D. Cabot Professor at Harvard, and a former Chief Economist at the IMF. His book written alongside Carmen Reinhart is titled This Time is Different: Eight Centuries of Financial Folly (2009) and is considered to be one of the most important research book on financial crises. His treatise Foundations of International Macroeconomics (1996) written with Maurice Obstfeld is a standard graduate text worldwide. Rogoff is a member of the National Academy of Sciences, the American Academy of Arts and Sciences, and the Group of Thirty, and ranks in the top ten among all economists by scholarly citations. He is also an international grandmaster of chess.