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Envy-free (EF) item allocation is a fair item allocation problem, in which the fairness criterion is envy-freeness - each agent should receive a bundle that they believe to be at least as good as the bundle of any other agent. [1]: 296–297 Since the items are indivisible, an EF assignment may not exist.
An important implication of the theorem is that any single-item auction which unconditionally gives the item to the highest bidder is going to have the same expected revenue. This means that, if we want to increase the auctioneer's revenue, the outcome function must be changed. One way to do this is to set a Reservation price on the item. This ...
Suppose the auction has risk-neutral bidders. Each bidder has a private value drawn i.i.d. from a common smooth distribution . Given free disposal, each bidder's value is bounded below by zero. Without loss of generality, then, normalize the lowest possible value to zero.
A first-price sealed-bid auction (FPSBA) is a common type of auction. It is also known as blind auction. [1] In this type of auction, all bidders simultaneously submit sealed bids so that no bidder knows the bid of any other participant. The highest bidder pays the price that was submitted. [2]: p2 [3]
A no-reserve auction (NR), also known as an absolute auction, is an auction in which the item for sale will be sold regardless of price. [1] [2]From the seller's perspective, advertising an auction as having no reserve price can be desirable (but risky) because it potentially attracts a greater number of bidders due to the possibility of a bargain. [1]
A bidding fee auction, also called a penny auction, is a type of all-pay auction in which all participants must pay a non-refundable fee to place each small incremental bid. The auction is extended each time a new bid is placed, typically by 10 to 20 seconds.