The most important characteristic of climate change as a policy problem is uncertainty. From climatology to economics, uncertainties are pervasive, large and difficult to resolve. However, the economic theory of environmental policy under uncertainty provides a clear guide to the design of an...

It is widely recognized that information technology was critical to the dramatic acceleration of U.S. labor productivity growth in the mid 1990s. This paper traces the evolution of productivity estimates to document how and when this perception emerged. Early studies concluded that information...

Official U.S. poverty statistics based on household income imply that the proportion of the U.S. population below the poverty level reached a minimum in 1973, giving rise to the widespread impression that the elimination of poverty is impossible. By contrast, poverty estimates based on household...