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Geographic Market Definition In An International Context, George A. Hay, John C. Hilke, Philip B. Nelson

Cornell Law Faculty Publications

Market definition is generally regarded as a key step in antitrust analysis. Market definition has two components. Product market definition seeks to include all products that are meaningful substitutes. Geographic market definition seeks to incorporate all relevant sources of the product in question. This paper is concerned with geographic market definition and, in particular, how geographic markets are defined in situations where competition may, at least to some extent, transcend national boundaries.

The subject of the paper may be of some current interest for two reasons. First, the perception is widespread that, over the past twenty or so years, competition …