Abstract
This article examines the classification of regime types. It shows that most writers classify regime types with reference to both their dispositional properties (whether there is a president and/or a prime minister, whether or not they are popularly elected and whether or not they serve for a fixed term) and their relational properties (the actual patterns of executive politics in the political system). It is argued that this juxtaposition of dispositional and relational properties creates a conceptual ambiguity. As a result, it is concluded that classifications of regime types should be made on the basis of either dispositional or relational properties but not both together. It then shows that writers who classify regime types with reference to relational properties are likely to make highly contestable assumptions about how power is actually exercised. This is because the question of where executive power lies in a particular country is often subject to not just one incontestable interpretation but to a number of contestable and mutually exclusive interpretations. This point is illustrated by examining the case of the Fifth French Republic. Therefore, it is concluded that the classification of regime types should be made with reference to dispositional properties alone.