Ougaard, M. Dimensions of Hegemony. Cooperation and Conflict, XXIII, 1988, 197- 214. The first section of the article deals briefly with the history of the concept of inter national hegemony. The second section identifies several dimensions in various defi nitions of the concept. The first dimension is the distribution of resources implying that hegemony is defined as a preponderance of material power resources, while the second dimension is control over outcomes. In some definitions the hegemon has a greater control than other actors, no matter which outcomes are attained. In other definitions a specific kind of outcome is required, such as the provision of certain collective goods. A related question is whether the hegemon takes care of shared interests or is catering to its own interests, to the detriment of those of others. This points to what is arguably a somewhat neglected dimension of hegemony: the underlying pattern of interests. It is suggested that the concept of hegemony is relevant in situations with common basic interests and secondary but significant contradictory interests. In such a situation hegemony is defined as one actor's ability to provide for its own interests in conflicts of a secondary nature. The third section focuses on the patterns of interests underlying US hegemony. Three possible changes that can lead to declining hegemony are examined: increasing difficulties for the common interests, increasing incompatibility between the interests of the hegemon and its allies, and finally a growing disparity within the hegemon's own interests. The evidence is only suggestive and points in different directions, but on balance it tends to strengthen the case for declining hegemony.