This article examines a two-period differentiated-products duopoly in which consumers are partially "locked in" by switching costs that they face in the second period. While these switching costs naturally make demand more inelastic in the second period, they also do so in the first period,...

We analyze the Nash eqilibria of a one-stage game in which the nature of the strategic variables (prices or quantities) is determined endogenously. Duopolists producing differentiated products simultaneously choose either a quantity to produce or a price to charge. In the absence of exogenous...

Committing to prices that result in rationing may be more profitable than setting market-clearing prices if customers must make sunk investments to enter the market. Rationing is ex post inefficient, but it gives more surplus to lower-value customers who are the marginal consumers the...

Price controls lead to misallocation of goods and encourage rent seeking. The misallocation effect alone ensures that a price control always reduces consumer surplus in an otherwise-competitive market with convex demand if supply is more elastic than demand or with log-convex demand (e.g.,...

Price controls lead to misallocation of goods and encourage rent-seeking. The misallocation effect alone is enough to ensure that consumer surplus is always reduced by a price control in an otherwise-competitive market with convex demand if supply is more elastic than demand; or when demand is...

We briefly survey the economics of network effects and switching costs (in 3,400 words). For comprehensive coverage of the same ground see Farrell and Klemperer`s 60,000-word contemporaneous survey, available at www.paulklemperer.org.

Part ownership of a takeover target can help a bidder win a takeover auction, often at a low price. A bidder with a toehold bids aggressively in a standard ascending auction because its offers are both bids for the remaining shares and asks for its own holdings. While the direct effect of a...

We usually assume increases in supply, allocation by rationing, and exclusion of potential buyers will never raise prices. But all of these activities raise the expected price in an important set of cases when common-value assets are sold. Furthermore, when we make the assumptions needed to rule...