When entrants only differ in their exogenous entry costs, the order in which potential firms enter does not affect industry size. With discrete competitors, entry orderings can affect total sunk costs and the identity of entrants. A necessary and sufficient condition is established for sunk,...

This paper presents a closed form solution to the portfolio adjustment problem in discrete time when the investor faces fixed transaction costs. This transaction cost model assumes a mean-variance investor who wants to adjust her holdings of a risky and risk-free asset. It is shown how this...