I examine a Knightian (1921) model of risk using a general equilibrium model of investment and trade. A population of agents with various preference types can choose between a safe production technology and a risky production technology. In addition, the distribution of types of agents changes...

Although the General Agreement on Trade and Tariffs prohibits discriminatory import tariffs, GATT rules include means by which this prohibition can be circumvented. The previous literature use static models to show that discriminatory tariffs increase welfare. In a dynamic model, this is not...

The fundamental contribution of the paper is to contest the view that reducing barriers to entry cannot retard market performance when firm rivalry is productive. In a model of employee entry, we demonstrate that a reduction in barriers to entry causes no fall in industry price when incumbents...

We analyze models of product differentiation with perfect price discrimination and free entry. Although perfect price discrimination ensures efficient output decisions given product characteristics, coordination failures may prevent efficiency in the choice of product characteristics. More...

When can you cheat some people without damaging your reputation among others? In a trust game between a firm and a series of individuals from two groups of different sizes, the firm has more incentive to cheat minority individuals because trade with the minority is less frequent and the...

We propose a simple model of wage dispersion arising from oligopsonistic competition in the labor market. Our model has workers who are equally able but who have heterogeneous preferences for non-wage characteristics, while employers have heterogeneous productivity characteristics. We completely...

The standard resource extraction framework assumes infinitely lived agents and yields an overfishing result. For some applications, a finite time horizon may be more appropriate. A direct extension of the Levhari-Mirman model to overlapping generations yields an extreme overfishing result....

We set out a model of monopsonistic competition, where each employer competes equally with every other employer. The employment effects of minimum wages depend on the degree of distortion in the labor market. If fixed costs per firm are high then the labor market is relatively non-competitive...