Ken Rogoff Expects Slow Growth and Sovereign Defaults

Ken Rogoff

Among the crush of analysis devoted to the financial crisis, perhaps none has been as influential as that of Kenneth Rogoff and Carmen Reinhart, co-authors of the book This Time is Different, published in October.  Looking back at 800 years of data on emerging and developed economies, they showed that financial crises – and the recoveries from those crises – follow a highly predictable pattern, and the title of their book was a jab at those who suggest otherwise.

History is a valuable guide, Rogoff and Reinhart contend, and it shows that we should expect sub-par growth for the US economy and a number of sovereign debt defaults.

Rogoff spoke at the CFA Institute annual conference last week in Boston.  I also spoke with him directly prior to his talk.

Most accounts of the financial crisis have focused on qualitative and personal angles, highlighting, for example, the sleepless weekends Treasury secretary Henry Paulson spent coordinating rescue efforts.  In contrast, Rogoff and Reinhardt took a purely quantitative focus.  That approach, Rogoff claimed, was unprecedented in the academic or policy literature. 

They collected and studied data on housing prices, unemployment, equity markets and other key variables, uncovering the similarities across crises that became the organizing theme of their book.   Emerging and developed market crises throughout the world, over that 800-year period, have followed remarkably similar patterns, with collapses of their housing markets being their central cause.

That commonality really surprised Rogoff, and he said it revealed something about human nature that breaks through political and institutional differences across the countries they studied.

What’s in store for the US economy

His data show that the average peak-to-trough decline in the economy lasts a year and a half, followed by a recovery of the same duration.  High unemployment lasts four to five years.  The US is tracking this at an uncannily close pace.  Only equity prices, which came back faster in the US than elsewhere, deviated from the pattern.

More important is the effect of increased debt that countries incur following a crisis.  Rogoff said external debt levels, which combine government and private borrowings, offer the highest predictability of future problems.   External debt that rises above 90% of GDP stunts the growth of advanced economies by 1% annually.