| Abstract: | This paper considers a sequential entry game of homogeneous firms in a vertically differentiated market. A firm can choose any variety of products, with a fixed cost per product. Each product can be withdrawn afterwards without exit costs. Then each firm chooses one product at most in equilibrium because of a commitment problem. The first firm chooses the highest quality if the fixed cost is so large that subsequent entry is blockaded. It chooses middle quality to deter entry of a low–quality firm if the fixed cost decreases. Hence everyone becomes worse off as the entrant becomes more dangerous. JEL Classification Numbers: D43, L13. |
