Forthcoming in The Oxford Handbook of International Antitrust Economics (Roger D. Blair & D. Daniel Sokol, ed., 2013).
20 Pages Posted: 16 May 2013
Date Written: May 15, 2013
Market definition has long held a central place in competition law. This entry surveys recent analytical work that has called the market definition paradigm into question on a number of fronts: whether the process is feasible, whether market share threshold tests are coherent, whether the hypothetical monopolist test in merger guidelines is counterproductive, and whether and when the frequent focus on cross-elasticities is useful.
Keywords: Market definition, Market share thresholds, Mergers, Merger guidelines, Hypothetical monopolist test, Cross-elasticity, Competition policy, Antitrust
JEL Classification: D42, K21, L11, L40
Suggested Citation: Suggested Citation