We approach business cycles on the basis of extrinsic uncertainty, related to static indeterminacy of free entry oligopolistic equilibria. Firms, producing under increasing returns to scale, compete in prices in contestable markets. The number of active firms varies across sectoral equilibria,...

This paper develops a small open economy, sticky-price model that determines a unique, stable long-run asset position for households as function of their incentive to anticipate or postpone consumption and labor effort across periods. This is accomplished by adopting an overlapping-generations...

This paper proposes a dynamic stochastic general equilibrium model characterized by heterogenous labor schedules and non-separability between consumption and labor in the utility function. The model successfully describes output, consumption, investment, and interest rates after a monetary...

This paper constructs a scale-free endogenous growth model and studies the determinants of optimal R&D policy. The model combines two of the main approaches to removal of scale effects: the rent protection approach and the diminishing technological opportunities approach. The steady-state rate...

This paper studies optimal monetary policy rules in a framework with sticky prices, matching frictions and real wage rigidities. Optimal policy is given by a constrained Ramsey plan in which the monetary authority maximizes the agents' welfare subject to the competitive economy relations and the...

To conduct policy efficiently, central banks must use available data to infer, or learn, the relevant structural relationships in the economy. However, because a central bank's policy affects economic outcomes, the chosen policy may help or hinder its efforts to learn. This paper examines...

Allowing for innovation dynamics in the software market, this paper studies the conditions under which standardization in the hardware market arises and persists over time. In the model, software firms repeatedly invest in quality upgrades, compete in the product market, and make exit as well as...

This article provides a unified framework for analyzing a wide variety of real option problems. These problems include the frequently studied, simple real option problems, as described in Dixit and Pindyck [1994. Investment Under Uncertainty. Princeton University Press, Princeton] for example,...