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Auction sniping (also called bid sniping) is the practice, in a timed online auction, of placing a bid likely to exceed the current highest bid (which may be hidden) as late as possible—usually seconds before the end of the auction—giving other bidders no time to outbid the sniper.
The generalized second-price auction (GSP) is a non-truthful auction mechanism for multiple items. Each bidder places a bid. The highest bidder gets the first slot, the second-highest, the second slot and so on, but the highest bidder pays the price bid by the second-highest bidder, the second-highest pays the price bid by the third-highest, and so on.
In the case of the second-price ruling as in a Vickrey auction, the final price for the winner is based on the second bidder's price. A Proxy bid is a special case of second-price ruling used by eBay, where a predefined increment is added to the second highest bid in response to a yet higher bid.
This may in the future lead to a standardization of sourcing procedures, reduced order cycle, which can enable businesses to reduce prices and generally provide a higher level of service. [4] In a traditional auction, the seller offers an item for sale. Potential buyers are then free to bid on the item until the time period expires.
Proxy bidding is an implementation of an English second-price auction used on eBay, in which the winning bidder pays the price of the second-highest bid plus a defined increment. It differs from a Vickrey auction in that bids are not sealed ; the "current highest bid" (defined as second-highest bid plus bid increment) is always displayed.
A double auction is a process of buying and selling goods with multiple sellers and multiple buyers. [1] Potential buyers submit their bids and potential sellers submit their ask prices to the market institution, and then the market institution chooses some price p that clears the market: all the sellers who asked less than p sell and all buyers who bid more than p buy at this price p.
Shill bidding is the most prominent type of online auction fraud where sellers themselves submit bids to increase the price of an item they have put up for sale, without intending to win. [25] Shill bidding is also one of the most difficult types of fraud to detect, since it is usually conducted by the seller in collusion with one or more ...
In France, when the last bid has been made in an auction for an art object, a representative of the state can say "Préemption de l'état" ("Pre-emption of the state") and buy the object for the highest bid. [4] Some housing cooperatives similarly allow members of the cooperative to pre-empt any buyer of a house constructed by the cooperative. [5]