Antitrust & Competition Policy Blog

Editor: D. Daniel Sokol
University of Florida
Levin College of Law

Monday, March 26, 2012

The Robustness of Exclusion in Multi-dimensional Screening

Posted by D. Daniel Sokol

Paulo Barelli (University of Rochester), Suren Basov (La Trobe University), Mauricio Bugarin (Insper Institute) and Ian King (University of Melbourne) explore The Robustness of Exclusion in Multi-dimensional Screening.

ABSTRACT: We extend Armstrong's result on exclusion in multi-dimensional screening models in two key ways, providing support for the view that this result is generic and applicable to many different markets. First, we relax the strong technical assumptions he imposed on preferences and consumer types. Second, we extend the result beyond the monopolistic market structure to generalized oligopoly settings with entry. We also analyze applications to several quite different settings: credit markets, the automobile industry, research grants, the regulation of a monopolist with unknown demand and cost functions, and involuntary unemployment in the labor market.

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