International management studies have been based primarily on the comparison of managerial behavior in countries around the world. Often, these studies have implied that business-people behave similarly with their domestic colleagues as with their foreign counterparts. In questioning that assumption, this study tests whether intra-cultural behavior accurately predicts cross-cultural behavior. Using a negotiation simulation and a sample of 462 Japanese, American, and Canadian businesspeople, behaviors in cross-cultural negotiations were found to differ in some important ways from those in intra-cultural negotiations.