Bidding in different (single object) auctions, or cross-bidding, and bidding incrementally within one auction, or nibbling, are two phenomena observed in platforms like eBay. This paper tests with numerical methods the validity of a theoretical setting that rationalizes such behavior, while...

We study the efficiency of the uniform auction as an allocation mechanism for emission permits among polluting firms. In our model, firms have private information about their abatement costs, which differ across firms and across units, and bidders' demands are linear. We show that there is a...

We construct a model of multi-unit auctions in which I bidders bid for two indivisible units of a common value good. Using a first-order approach, we find that there are equilibria in which bidders bid the same price for both units in the discriminatory auction, but not in the uniform auction....