Consider a market in which firms compete to develop a new product. While most work focuses on a single firm successfully developing the new product, the emphasis here is on possibly multiple firms devloping the new product. Thus, a firm has uncertainty about how many competitors it will face as...

A major empirical interest in growth studies is whether a permanent change in economic fundamentals affects the long-run growth rate. However, a direct time series analysis of this hypothesis may not always be feasible because the permanence of many such changes is rather questionable. This...

We develop a model of an overlapping generations economy characterized by provate pensions where risk averse agents face both longetivity and investment risks.