Which are the main difficulties normally encountered when defining the relevant market for competition analysis?
As coordinated effects we define the outcomes that arise when, under certain market conditions (see answer 7 for details), the merger increases the possibility for the parties to successfully coordinate behaviours in an anti-competitive way. The main issue is not the market power of the merging parties resulting from the merger, but, instead, whether the merger will create or strengthen certain market conditions which allow firms in the market facilitating the promotion of coordinated practices and actions that affect the consumers’ welfare.
