This paper examines a model of optimal growth where the agregation of two separate well behaved and concave production technologies exhibits a basic non-convexity. Multiple equilibria prevail in an intermediate range of interest rate. However, we show that the optimal paths monotonically...

We propose a simple model of a partially integrated industry which explicitly takes into account persistent production cost differences across upstream firms, such as one might observe in natural resource industries. The model allows us to highlight the respective roles of strategic...

The Porter hypothesis asserts polluting firms can benefit from environmental policies, arguing that well-designed environmental regulations stimulate innovation, which by increasing either productivity or product value, leads to private benefits. As a consequence, environmental regulations would...

This paper analyzes some of the problems that arise in decentralizing education to the private sector. We concentrate on the difficulties that result from heterogeneity among students and competition among schools in a locational setting. We analyze two main issues, the resources expended by...