This paper estimates a dynamic, structural model of entry and exit in an oligopolistic industry and uses it to quantify …. Entry costs faced by potential entrants, fixed costs faced by incumbent producers, and the toughness of short-run price … the dentist industry allow the entry cost to differ for geographic markets that were designated as Health Professional …

The U.S. and EU Merger Guidelines strongly emphasize the relevance of the "ease of entry" argument in merger … evaluations. Up to now, very little is known empirically about how mergers affect entry and exit, and the resulting number of … dominated mergers. Interestingly, we also find that mergers foreclose potential entry in other product markets and reduce the …