EU Merger Control Regulation No 4064/89 tended to rely on a dominance test, based on the market share of undertakings, to indicate the level and potential changes in market power. The use of such in differentiated product industries is questionable. New EC Merger Regulation No 139/2004...

While often times the Hypothetical Monopolist Test (HMT) utilized in relevant market delineation is implemented with uniform price increases throughout all the goods in the candidate relevant market, since 1984 the versions of the U.S. Merger Guidelines have emphasized that these small but...

While often times the Hypothetical Monopolist Test (HMT) utilized in relevant market delineation is implemented with uniform price increases throughout all the goods in the candidate relevant market, since 1984 the versions of the U.S. Merger Guidelines have emphasized that these small but...

Due to the presence of network externalities in multi-sided markets, evaluating the performance of a platform is more difficult than for a firm in a traditional market. In this paper I develop methods for determining platform marginal costs, market power, and post-merger price predictions. I...

This study estimates the price effects of horizontal mergers in the U.S. grocery retailing industry. We examine fourteen regions affected by mergers including both highly concentrated and relatively unconcentrated markets. We identify price effects by comparing markets affected by mergers to...

In this essay, we describe antitrust analysis of horizontal mergers in U.S. retail markets. We begin by providing a brief overview of the economic and legal framework governing horizontal merger policy, and highlight key issues in analyzing retail mergers. Next, we discuss the changing legal...

We analyze a large merger in the Dutch banking market during the financial crisis using disaggregated data. Based on a merger simulation model, we evaluate merger-induced changes in the interest rates for savings accounts. We find that the merging banks decreased interest rates by 3 to 5 percent...

We investigate the trade-off between financial stability and competition policy by focusing on the merger of ABN AMRO and Fortis Bank NL in the Dutch retail banking market. The financial crisis delayed the completion of the merger giving rise to anti-competitive behavior in the transitory...