0 . 0 . 34
نویسندگان
چکیده
The buyer’s type is his value ∈ [ ] and the seller’s type is his cost ∈ [ ]. The buyer’s value is drawn from a distribution (·) whose density (·) is nonzero on [ ], while the seller’s cost is drawn from the distribution (·) whose density (·) is nonzero on [ ]. A trader observes his own type but not the type of the other trader. The buyer’s ex post utility from acquiring the item is − where is any payment that he makes. The buyer’s utility is − when he makes the payment and does not receive the item. Similarly, the buyer’s ex post utility from selling the item is − where is any payment that he receives. The seller’s utility is when he receives the payment and does not give up the item the item. A revelation mechanism consists of an allocation rule ( ) and ( ), where ( ) specifies the probability that the item is transferred and ( ) the payment from buyer to seller when and are reported. Notice that ( ) can be nonzero (money can change hands) even when the item is not transferred. The efficient allocation rule ( ) requires that
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