Private international law is normally discussed in terms of rules applied in litigation involving parties from more than one State. Those same rules are fundamentally important, however, to those who plan crossborder commercial transactions with a desire to avoid having a dispute arise — or at least to place a party in the best position possible if a dispute does arise. This makes rules regarding jurisdiction, applicable law, and the recognition and enforcement of judgments vitally important to contract negotiations. It also makes the consideration of transactional interests important when developing new rules of private international law. These lectures examine rules of jurisdiction and rules of recognition and enforcement of judgments in the United States and the European Union, considering their similarities, their differences, and how they affect the transaction planning process.