*Director, Center for International Business, School of Business Administration, University of Miami, Coral Gables, Florida. **Director, Center for International Trade and Investment Promotion, Kenan-Flag- ler Business School, University of North Carolina, Chapel Hill, North Carolina. Transnational Corporations, vol. I, no. I (February 1992), pp. 93-126. 93 Theory in international business Robert Grosse* and Jack N. Behrman** International business has existed as a distinct field of study for the past three decades, but it does not have a widely accepted explanatory theory on which to base its unique- ness as a discipline. David Ricardo's theory of comparative advantage, Raymond Vernon's product life cycle, John Dunning's eclectic theory and all others are essentially ex- planations of business between domestic firms or regions, as well as international firms. They explain "multi- domestic" investment and intra-national trade. Those theories offer important insights into the functioning of firms in business anywhere, including international firms, but they fail to focus on the distinguishing characteristics of business operating among different nations. Since inter- national business is the study of business activities that cross national borders and, therefore, is fundamentally con- cerned with the firms that undertake that business and the national Governments that regulate them, a theory that is unique to such business must explain the responses of busi- nesses to government policies and the policy-making of Governments themselves towards international firms. Em- pirical studies have distinguished international from domes- tic business strategies and operations, but they have not resulted in an international theory of cross-national busi- ness behaviour. The lack of a proper theoretical focus has diverted the discipline from an emphasis on policy and on conflicts and cooperation among corporations and Govern- ments. A framework for constructing such a theory can be built on existing bargaining theory.