In this paper, I compare economic arguments in U.S. Supreme Court antitrust and EU Court of Justice competition policy decisions on four topics: refusal to deal, predation, vertical contracts, and hor- izontal interfirm relations.

This paper shows (1) that the Spence-Dixit-Vives model of linear demand for differentiated varieties is implied if supplies of substitutes reduce individual consumers' reservation prices as indicated in the paper, (2) that for the micro-foundation-based version SDV demand and endogenous sunk...

We model the impact of the transfer price rule (a constraint that re- quires the downstream division of a vertically-integrated ?rm to earn at least a normal rate of return on investment in the counterfactual case that it pays the same price as a nonintegrated ?rm for the essential input), re-...

We examine conditions under which a platform ?rm can exclude rivals by bundling a product that some on one side of the market re- gard as essential with its platform, and pursue implications for market performance. We show that the impact of an exclusive dealing con- tract between the upstream...