Theory and Practice of Competition Economics Market Definition

The conventional method of defining the relevant product and geographic market was undoubtedly in the foreground of the practice of the European Commission. Since a few years we can see new approaches coming which are less based on the current practice than on economic theories, and in particular econometric modeling. The article deals with the theory and practice of competitive economic market definition. The article includes a brief explanation of the principles of market definition and the logic of the SSNIP test