I survey the recent literature on the formation of networks. I provide definitions of network games, a number of examples of models from the literature, and discuss some of what is known about the (in)compatibitily of overall societal welfare with individual incentives to form and sever links.

We examine the relevance of an auction format in a competitive environment by analyzing and comparing uniform and discriminatory price auctions with many bidders. We show that if the number of objects for sale is small relative to the number of bidders, then all equilibria of both auctions are...