We compare "real business cycle" and increasing returns models of economic fluctuations. In these models, business cycles are driven by productivity changes resulting either from technology shocks or from crucial building blocks that give both types of models hope of fitting the data. These...

In this paper we develop a new insight into the process of learning in an infant industry, in a setting where entrepreneurs are differentiated by talent. The learning rate depends on the quality of ideas, not on the scale of the industry, and a competitive open economy regime may furnish a...

We consider three questions related to the choice between war in Iraq and a continuation of the pre-war containment policy. First, in terms of military resources, casualties and expenditures for humanitarian assistance and reconstruction, is war more or less costly for the United States than...

The trouble with options is that too many options are granted to too many people. Most options are granted below the top-executive level, and options are often an inefficient way to attract, retain and motivate executives and (especially) lower-level employees. Why, then, are options so...