We analyze the optimal auction of multiple non-identical objects when buyers are risk averse. We show that the auction formats that yield the maximum revenue in the risk neutral case are no longer optimal. In particular, selling the goods independently does not maximize the seller's revenue. We...

We analyze the effects of resale through bargaining in multi-object uniform-price auctions with asymmetric bidders. The possibility of resale affects bidders’ strategies, and hence the allocation of the objects on sale and the seller’s revenue. Our experimental design consists of four...

We study multi-object auctions in the presence of post-auction trade opportunities among bidders who have either single- or multi-object demand. We focus on two formats: Vickrey auctions where package bidding is possible and simultaneous second-price auctions. We show that, under...

We analyze the effects of resale through bargaining in multi-object uniform-price auctions with asymmetric bidders. The possibility of resale affects bidders' strategies, and hence the allocation of the objects on sale and the seller's revenue. Our experimental design consists of four...

I study a market where agents with unit demand jointly own heterogeneous goods. In this market, the existence of an efficient, incentive compatible, individually rational, and budget balanced mechanism depends on the shares of the agents. I characterize the set of shares for which having such a...

In Taipei we observed a dual Dutch fish auction, like a conventional Dutch auction with bundling but with the roles of quantity and price reversed, and fish the numeraire rather than money. This paper uses a symmetric independent private values framework to study how duality interacts with...

Allowing resale in multi-object auctions increases bidders. incentives to jointly reduce demand, because resale increases low-value bidders’ willingness to pay and reduces high-value bidders’ willingness to pay. Therefore (unlike in single-object auctions), resale may reduce the seller’s...

The possibility of resale after an auction attracts speculators (i.e., bidders who have no use value for the objects on sale). In a multi-object auction, a high-value bidder may strictly prefer to let a speculator win some of the objects and then buy in the resale market, in order to keep the...