-product firms. Aggregate product variety is determined by product variety choices of multi-product firms and entry/exit decisions of …

-level heterogeneity of productivity. An excess entry occurs in low-markup (competitive) industry, and vice versa in high-markup (non …

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 …

We study the entry timing and location decisions of two exclusive buyer-supplier relationships in a continuous …-time spatial competition model. In each relationship, the firms determine their entry timing and location, and negotiate a … equilibrium location of the leader will be closer to the center, inducing a delay in entry by the second entrant (called the …

We investigate the entry timing and location decisions under market-size uncertainty with Brownian motions in a … options literature. Also, although the follower's entry timing tends to be late as the volatility becomes amplified, the … the equilibrium entry decisions with the second-best ones. …