The literature on international bargaining offers many books and articles on how nations come to engage in a bargaining interaction, on the process of bargaining, and on the various kinds of outcomes.l Little attention has been given, however, to two aspects of bargaining which are crucial to a successful outcome (an agreement which is implemented). These are: ( 1 ) the relationships among elements in the phases of bargaining which are conducive to reaching an enforceable agreement, and (2) the elements in bargaining which are helpful in en f orcing the agreement. These aspects are perhaps more distinct than appears at first glance, but they are also interrelated, since the second depends on the first.Lack of attention to implementation problems and to the stages or phases of negotiation has produced theories of bargaining which are incomplete and often incompatible. If the theorist's emphasis is on elements that are helpful in keeping negotiations moving, he may overlook those qualities which other theorists feel are necessary to reaching an agreement. If he is mainly interested in qualities helpful to coneluding an agreement, he may concentrate on methods of consensus-building which are detrimental to what other theorists see as requirements for enforceability.The first part of this study describes several incompatibilities among the phases of international bargaining which must be resolved if we are to achieve a comprehensive theory of international negotiation, including the successful outcome defined above. The second part contains a model of international negotiation which attempts to resolve the incompatibilities. The aim of the model is to suggest elements in negotiation which aid the movement of the bargaining through all its phases, including the terminal one of enforcing the agreement.