Hayes, JohnShapiro, CarlTown, Robert J2023-05-222023-05-222007-01-012016-06-11https://repository.upenn.edu/handle/20.500.14332/2719Business Administration, Management, and OperationsOrganizational Behavior and TheoryRisk AnalysisMarket Definition in Crude Oil: Estimating the Effects of the BP/ARCO MergerArticle