Abstract
Four classes of trade simulation models (each unified by strong similarities of purpose, design, or method) are identified and prominent examples within each class are described. By discussing the strengths and weaknesses of each class, we can begin to identify key aspects of trade relations that are important to the theoretical as well as formal specification of the political economy of international trade relations. By observing the variety of model applications, we can identify three ways in which formal models may be used for theory building in international relations: as a means of studying specific issue areas, as a way of testing theoretical propositions or hypotheses, or as the formal representation of a particular theory.
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