Economists who assure us that advanced-economy debt is completely “safe” sound eerily like those who touted the “Great Moderation” – the supposedly permanent reduction in cyclical volatility – a generation ago. In many cases, they are the same people. But, as we saw a decade ago, and will inevitably see again, we are not at the “End of History” when it comes to global debt and financial crises.
Kenneth Rogoff, professor of economics and public policy at Harvard University and recipient of the 2011 Deutsche Bank Prize in Financial Economics, was the chief economist of the International Monetary Fund from 2001 to 2003. The co-author of "This Time is Different: Eight Centuries of Financial Folly," his new book, "The Curse of Cash," was released in August 2016.