Edited by Fabiana Di Porto and Rupprecht Podszun
Chapter 4: The pitfalls of market definition: towards an open and evolutionary concept
Market definition and the calculation of market shares for dominance are two features of competition law that are at the core of many abuse cases. Yet, the concepts – market definition, dominance – have significant weaknesses. Instead of turning away from market definition completely, as is advocated by some scholars, the better way seems to have a more open and evolutionary concept of market definition. Market definition is to be understood as the starting point for setting the scene, gathering economic information. This requires qualitative assessments and awareness for path dependencies and bounded rationality. Such an understanding may solve problems currently associated with market definition in multi-sided markets.
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