Temporary and Permanent Buyout Prices in Online Auctions
建立博弈模型，研究在线拍卖中临时与永久一口价选项的定价策略，发现引入一口价能显著提升卖方收益，但动态定价相比静态定价优势不大，永久选项虽收益更高却可能鼓励延迟出价。
Buyout options allow bidders to instantly purchase at a specified price an item listed for sale through an online auction. A temporary buyout option disappears once a regular bid is submitted, whereas a permanent option remains available until it is exercised or the auction ends. Such buyout price may be static and remain constant throughout the auction, or dynamic and vary as the auction progresses. We formulate a game-theoretic model featuring time-sensitive bidders with independent private values and Poisson arrivals but endogenous bidding times to answer the following questions: How should a seller set the buyout price (if at all)? What are the implications of using a temporary buyout option relative to a permanent one? What is the potential benefit associated with using a dynamic buyout price? For all buyout option types we exhibit a Nash equilibrium in bidder strategies, argue that this equilibrium constitutes a plausible outcome prediction, and study the problem of maximizing the corresponding seller revenue. Our numerical experiments suggest that when any participant is time sensitive, the seller may significantly increase his utility by introducing a buyout option, but that dynamic buyout prices may not provide a substantial advantage over static ones. Furthermore, whereas permanent buyout options yield higher predicted revenue than temporary options, they also provide additional incentives for late bidding and may therefore not be always more desirable.