Lawrence H. Summers

Policymaking for posterity involves current decisions with distant consequences. Contrary to conventional prescriptions, we conclude that the greater wealth of future generations may strengthen the case for preserving environmental amenities; lower discount rates should be applied to the far future, and special effort should be made to avoid actions that impose costs on future generations. -- Posterity brings great uncertainties. Even massive losses, such as human extinction, however, do not merit infinite negative utility. Given learning, greater uncertainties about damages could increase or decrease the optimal level of current mitigation activities. -- Policies for posterity should anticipate effects on: alternative investments, both public and private; the actions of other nations; and the behaviors of future generations. Such effects may surprise. -- This analysis blends traditional public finance and behavioral economics with a number of hypothetical choice problems.

The Great Depression led to the Keynesian revolution and dramatic shifts in macroeconomic theory and macroeconomic policy. Similarly, the stagflation of the 1970s led to the adoption of the natural rate hypothesis and to a major reassessment of the role of macroeconomic policy. Should the financial crisis and the Great Recession lead to yet another major reassessment and intellectual revolution?Will it? If so, what form should it, or will it, take? These are the questions taken up in the book, in a series of contributions by policymakers and academics. The contributors discuss the complex role of the financial sector, the relative roles of monetary and fiscal policy, the limits of monetary policy to address financial stability, the need for fiscal policy to play a more active role in stabilization, and the relative roles of financial regulation and macroprudential tools. The general message is a warning against going back to precrisis ways--to narrow inflation targeting, little use of fiscal policy for stabilization, and insufficient financial regulation.