meets entrants that enter one of the markets. We find that entry can enhance the total R&D expenditure of the incumbent firm …. That is, entry can stimulate R&D effort. Moreover, the incumbent's profit nonmonotonically changes as the number of … entrants increases. Depending on the fixed entry costs and R&D technologies, both insufficient and excess entry can appear. …

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 …

This paper investigates the effects of mergers, entry, and exit in retail markets when input prices are negotiated …

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 purpose of this paper is to study the effects of entry into the market for a single commodity in which both sellers …’ payoffs may increase. The conditions under which entry by new sellers raises the equilibrium payoffs of existing sellers are … sellers, and encompass entirely standard economic environments. Similar results are derived relating to the entry of …

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 …

consumers we establish see-saws between consumers and advertisers. Entry of a lower-quality platform increases consumer surplus …, but decreases advertiser surplus if industry platform profits decrease with entry. Merger decreases consumer surplus, but …