Abstract
The purpose of this paper is to research how effectively EU competition law and the Digital Markets Act address abuse of dominance by Big Tech within digital markets. The possibility that existing competition rules are underenforced or enforced ineffectively in digital markets creates an environment that favours the increase of market power of a few market players and the foreclosure of digital markets to new entrants, thus reducing competition to the detriment of consumers. In the absence of effective regulation in digital markets, it is crucial that new solutions are found to promote competition in these markets.