The Internet has radically transformed the way we live our lives. The net changes in consumer surplus and economic activity, however, are difficult to measure because some online activities, such as obtaining news, are new ways of doing old activities while new activities, like social media,...

Economic experiments yield lessons to firms that can be acquired only through market experience. Economic experiments cannot take place in a laboratory; scientists, engineers, or marketing executives cannot distill equivalent lessons from simply building a prototype or interviewing potential...

This paper investigates how the destabilizing of a social network may increase the scope of network externalities, using data on sales of a video-calling system made to an investment bank's employees and subsequent usage by these customers. The terrorist attacks of 2001 led potential customers...

This paper develops a dynamic model of trade and growth that we use to study how openness affects economic growth. In our model, heterogeneous firms choose to either produce with their existing technology or search within the domestic economy to adopt a better technology. These choices determine...

Purchasing power parity exchange rates, or PPPs, are price indexes that summarize prices in each country relative to a numeraire country, typically the United States. These numbers are used to compare living standards across countries, by academics in studies of economic growth, particularly...

The relative performance of China and India is compared using two different methods and they provide a very different picture of their relative performance. We compare the average absolute values of indictors for the decade of the 1980s, 1990s and the 2000s. We use indicators such as the current...

The UNFCCC process of negotiating multilateral carbon emissions reductions thus far has focused on approximately equiproportional cuts in annual carbon emissions by country along the lines of the Kyoto Protocol agreement. But now, with the objective of involving large developing countries such...

We perform an econometric analysis of the effect of new drug launches on longevity, using data from the IMS Health Drug Launches database and the WHO Mortality Database. Our data cover virtually all of the diseases borne by people in 52 countries during the period 1982-2001, and enable us to...

The connections between globalization and democracy are a classic question in international political economy and a topic much debated in foreign policy circles. While the analytical literature is extensive, few previous studies have acknowledged the possibility of bidirectional causality or...

The US Federal Reserve cut interest rates more vigorously in the recent recession than the European Central Bank did. By comparison with the Fed, the ECB followed a more measured course of action. We use an estimated dynamic general equilibrium model with financial frictions to show that...