, it later 'tips' to monopoly, after which entry is hard, often even too hard given incompatibility. And while switching … costs can encourage small-scale entry, they discourage sellers from raiding one another’s existing customers, and so also … discourage more aggressive entry. Because of these competitive effects, even inefficient incompatible competition is often more …

vertical product differentiation and entry. Both firms face fixed set-up costs and quality-dependent costs of production, and … compete on quality and price. With identical quality-dependent costs, the incumbent will always deter entry if possible, i ….e. if fixed costs are high. Quality will be set at a level lower than the optimal quality set if entry was accommodated. If …

that entry and exit rates are positively correlated across industries. Our objective is to investigate the effect of sunk … costs and, in particular, market size on entry and exit rates. We analyse a stochastic dynamic model of a monopolistically … show existence and uniqueness of a stationary equilibrium with simultaneous entry and exit: efficient firms survive while …

may trigger future entry and the collusive agreement is enforced by the most profitable 'grim trigger strategies …' available. It is shown that even in situations where perfect collusion can be sustained after entry, coping with a potential … entrant in a market which is growing over time may completely undermine any pre-entry collusive plans of the incumbent firms …

, predatory, and entry deterring behaviour. Ascending and uniform-price auctions are particularly vulnerable to these problems (we …