A buyer wishes to purchase a good from a seller who chooses a sequence of prices over time. In each period, the buyer can also exercise an outside option such as moving onto another seller. We show there is a unique equilibrium in which the seller charges a constant price in every period equal...

We re-examine the canonical question of Myerson and Satterthwaite (1983) whether two privately-informed parties, a buyer and a seller, can trade an indivisible good efficiently. We relax their assumption that utilities are quasi-linear; our main assumption instead is that the traded good is...