In a paper in the March 2004 AER, Justine Hastings concludes that the acquisition of an independent gasoline retailer, Thrifty, by a vertically integrated firm, ARCO, is associated with sizable price increases at competing stations. To better understand the novel mechanism to which she...

Merging firms regularly argue that mergers involving capacity-constrained firms are unlikely to be anti-competitive, because the incentive for the merged firm to raise prices and reduce quantity may not be strong enough to generate slack in the capacity constraints and lead to higher prices. We...

Merging firms regularly argue that mergers involving capacity-constrained firms are unlikelyto be anticompetitive, because a capacity-constrained firm does not represent a meaningful competitive constraint on its rivals. We construct a modified notion of upward pricing pressure called ccGUPPI,...

The recent emergence worldwide of pro-market regimes and the subsequent adoption of competition policies and enforcement agencies by nations worldwide have renewed interest in the harmonization of competition policy between the world's various antitrust agencies. Proposals by noted scholars and...

This paper generalizes the critical loss concept of Harris and Simons to account for a broader range of possible cost structures. Our focus on understanding the market level equilibrium for relatively homogenous goods makes it clear that the Harris and Simons procedure is appropriate in some...