Auction theory

Auction theory studies how auction rules shape participants’ bidding strategies, the allocation of goods, and the revenue sellers receive.

First-price sealed-bid auction: An auction in which each bidder submits one hidden bid and the highest bidder pays their own bid. Bidders shade bids because winning means paying the amount they offer.
Game theory: The mathematical study of strategic interaction among decision-makers. Auction bids are interdependent choices, not isolated price estimates.
Spectrum auction: An auction used to assign licenses for transmitting over designated radio-frequency bands. Telecommunications regulators use auction rules to allocate valuable spectrum licenses.
Posted-price mechanism: A selling method in which the seller sets a price and buyers choose whether to accept it. It replaces competitive bidding with a take-it-or-leave-it offer.
Collusion: Coordination among participants to reduce competition or influence market outcomes. Bidders may suppress rivalry, undermining predictions based on independent strategies.
Second-price sealed-bid auction: An auction in which the highest bidder wins but pays the second-highest bid. Under standard private values, bidding one’s true value is optimal.
Bayesian game: A game in which participants have private information about their characteristics or payoffs. A bidder’s value is often unknown to rivals and treated as a probability distribution.
Combinatorial auction: An auction allowing bids on bundles of items rather than only individual items. It addresses complementarities when a package is worth more than its parts.
Bargaining: A negotiation in which parties seek agreement on the terms of an exchange. Bargaining allows tailored offers instead of a fixed auction rule.
Winner's curse: The tendency for the winner of a common-value auction to have overestimated the item’s value. Winning itself conveys information that can make an aggressive bid costly.

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