Much of the existing auction literature treats auctions as running independently of one another, with each bidder choosing to participate in only one auction. However, in many online auctions, a number of substitutable goods are auctioned concurrently and bidders can bid on several auctions at...

The existing auction literature treats on-line auctions as running independently of one another with each bidder choosing to participate in only one auction. In fact, in the case of on-line auctions, many substitutable goods are auctioned concurrently and bidders can bid at several auctions at...