The recent proliferation of free trade agreements (FTAs) has resulted in an in- creasingly complex network of preferential trading relationships. The economics literature has generally examined the formation of FTAs as a function of the par- ticipating countries' economic characteristics alone....

We consider bidders who are simultaneously participating in private value second-price sealed bid auctions in multiple markets. While active in each market, each bidder is associated with a unique home market in which it can potentially serve as a ring center. Pairs of bidders can establish...