We present new identification results for nonparametric models of differentiated products markets, using only market level observables. We specify a nonparametric random utility discrete choice model of demand allowing rich preference heterogeneity, product/market unobservables, and endogenous...

We consider nonparametric identification in models of differentiated products markets, using only market level observables. On the demand side we consider a nonparametric random utility model nesting random coefficients discrete choice models widely used in applied work. We allow for...

Surveys of cartel proceedings reveal that illegal cartels usually (1) attempt to minimize the risk of detection, (2) achieve merely imperfect levels of collusion, (3) compete against some fringe firms, and (4) adjust to market entries and exits. By contrast, existing oligopoly models of...

The present note shows that "innocuous" Minimum Quality Standards, namely below the lowest quality in a market, may have effects on equilibrium outcomes. Such a MQS reduces the incentive to invest in R&D by the quality-leading firm.

This paper extends the concept of the exercise boundary as an analytical tool in determining when an optimizing agent might undertake an irreversible action under uncertainty. to situations where the objective function of optimizing agents depends on decisions taken by other agents. By using the...

We study dynamic price competition between sellers offering differentiated products with limited capacity and a common sales deadline. In every period, firms simultaneously set prices, and a randomly arriving buyer decides whether to purchase a product or leave the market. Given remaining...

The literature so far has analyzed the effects of Minimum Quality Standards (MQS) in oligopoly, using models of pure vertical differentiation, with only two firms, and perfect information. We consider products that are differentiated horizontally and vertically, with imperfect consumers'...

In this paper, we revisit the size of stable cartels in a symmetric oligopoly model with a Cournot fringe. Konishi and Lin (1999) make a conjecture on the size of stable cartels. Due to algebra complexity, they test the conjecture by conducting numerical simulations. We provide an analytical...