This paper analyzes the entry of new products into vertically diﬀerentiated markets where an entrant and an incumbent compete in quantities. The value of the new product is initially uncertain and new information is generated through purchases in the market. We derive the (unique) Markov perfect equilibrium of the inﬁnite horizon game under the strong long run average payoﬀ criterion. The qualitative features of the optimal entry strategy are shown to depend exclusively on the relative ranking of established and new products based on current beliefs. Superior products are launched relatively slowly and at high initial prices whereas substitutes for existing products are launched aggressively at low initial prices. The robustness of these results with respect to diﬀerent model speciﬁcations is discussed.
Bergemann, Dirk and Välimäki, Juuso, "Entry and Vertical Differentiation" (2001). Cowles Foundation Discussion Papers. 1556.