In multi-attribute procurement auctions with multiple objects, the auctioneer may care about the interplay of quality attributes that do not belong to the same item -- like each item's delivery time, if all items are needed at once. This can influence the performance of the auction mechanism. We...

It is commonly assumed in private value auctions that bidders have no information about the realization of the other bidders’ valuations. Nevertheless, an informative public signal about the realization may be released by a bidder while he learns his own valuation. Using a simple discrete...