We study an overlapping-generations economy in which new agents innovate and introduce new products and firms. Innovation is stochastic. The new firms increase overall productivity, but also steal business from pre-existing firms and act as depreciation shocks for the human capital of existing...

agents do not survive and do not affect prices in the long run. If relative risk aversion is unbounded, however, they may survive, and survival is neither necessary nor sufficient for their impact on prices. We provide necessary and sufficient conditions for price impact, as well as examples of...

We develop a firm specific measure of growth opportunities based on the covariance of the firm's stock return with a portfolio that is long investment and short consumption producers (IMC). Given that firms with high growth opportunities are the prime beneficiaries of investment-specific shocks,...

in both a simple analytic model, where news shocks overcome the ``dynamic inconsistencies" documented in Estrella and Fuhrer (2002), and in a model that incorporates many of the real rigidities common to DSGE models. The paper calls for more thoughtful modeling of how information about...

Using a dynamic factor model, we uncover four main empirical regularities on international comovements in a long-run panel of real and nominal variables. First, the contribution of world comovements to domestic output growth has decreased over the post-WWII period. The contribution of regional...

of reputation building converges to a level strictly between 0 and 1. However, the two limiting cases differ in the number of third party signals invoked.

linear hidden action preferences exhibiting a preference for late resolution of uncertainty. The costly contemplation model (Ergin and Sarver (2008a)), as well as a generalization of the Kreps and Porteus (1978) model that allows for preference for flexibility in the sense of DLR (2001) are also...

and search for a difference in the pattern of environmental quality when technological progress is taken to be endogenous by extending Brock and Taylor (2003). Brock and Taylor define pollution production and abatement explicitly by considering pollution as an output of both production and...

data support the model predictions.

Capacity addition and withdrawal decisions are among the most important strategic decisions made by firms in oligopolistic industries. In this paper, we develop and analyze a fully dynamic model of an oligopolistic industry with lumpy capacity and lumpy investment/disinvestment. We use our model...