The practical importance of auction theory is widely recognized. Indeed, economists have been recognized for their contribution to the design of several auction-like mechanisms, such as the U. S. Federal Communications Commission spectrum auctions, the 3G auctions in Europe and beyond, and the auction markets for electricity markets around the world. Moreover, auction theory is now seen as an important component of an economist's training. For example, some of the more celebrated results from the single-object auction theory are now usually …