A Two-Dimensional Scheme for Classifying the States According to Degree of Inter-Party Competition

The student of American politics has displayed an increasing interest in the states as units of analysis. Since the states share a common institutional framework and cultural base, and at the same time differ in respect to economy, politics, and social structure, they provide excellent material for comparative studies. The political scientist has at hand a group of political units in which some of the most elusive variables are held constant. In the comparative study of American state politics, then, there is the promise that hypotheses about politics in general may be formulated and tested. The first stage of analysis is classification. Since competition between political parties for public office is a basic concept in the study of American politics, the nature and degree of party competition provide important criteria for a classification of the states. It is the purpose of this paper to point up the difficulties involved in formulating a classification of the states according to their party systems and to suggest possible categories of party competition which such a classification might include.