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...

The SSNIP test and Critical Loss Analysis are widely used tools for determining market definition in merger and sometimes other antitrust matters. However, the standard techniques used to test for a relevant antitrust market are incorrect when the firms in question operate two-sided platforms....