Does news about future productivity cause business-cycle fluctuations? What other effects might it have? We explore the answer to this question using semi-structural VARs, where “news” is defined as the innovation in the expectation of TFP at a fixed horizon in the future. We find that...

We study a dynamic economy where credit is limited by insufficient collateral and, as a result, investment and output are too low. In this environment, changes in investor sentiment or market expectations can give rise to credit bubbles, that is, expansions in credit that are backed not by...

We develop a stylized model of economic growth with bubbles. In this model, financial frictions lead to equilibrium dispersion in the rates of return to investment. During bubbly episodes, unproductive investors demand bubbles while productive investors supply them. Because of this, bubbly...

This expository paper describes major developments during the second decade of rational-expectations macroeconomics, roughly 1982-1991. Topics attracting the most attention from researchers differed from those of 1972-1981, with considerable emphasis being devoted to technical mailers. Here the...

We reconsider the empirical links between volatility and growth between 1970 and 2007. There is a strong and significant correlation between individual country growth rates and global factors that are arguably exogenous with respect to their economies. The amount of volatility driven by these...

We study the impact of information and communication technology on growth through its impact on organization and innovation. Agents accumulate knowledge through two activities: innovation (discovering new technologies) and exploitation (learning how to use the current technology). Exploitation...

We explore a view of the crisis as a shock to investor sentiment that led to the collapse of a bubble or pyramid scheme in financial markets. We embed this view in a standard model of the financial accelerator and explore its empirical and policy implications. In particular, we show how the...

We live in a new world economy characterized by financial globalization and historically low interest rates. This environment is conducive to countries experiencing credit bubbles that have large macroeconomic effects at home and are quickly propagated abroad. In previous work, we built on the...

In the early twentieth century, education legislation was often passed based on arguments that new laws were needed to force immigrants to learn English and "Americanize." We provide the first estimates of the effect of statutes requiring English as the language of instruction and compulsory...

How can we allow patent examiners to effectively distinguish between patentable and unpatentable inventions, without slowing the process to a crawl or wasting a bunch of money? This essay reviews the recent literature and considers a number of proposals and their limitations. It concludes that...