EMILY VAN DUNK AND RONALD E. WEBER
Constituency-Level Competition in the U.S. States, 1968-1988: A Pooled Analysis
Legislative Studies Quarterly XXII:141-59

This work examines constituency-level competition in U.S. state legislative races for the period 1968-88 using two measures of competition--proportion of seats marginal and proportion of seats contested. An incentive model is assessed to determine the impact of four variables--legislative institutionalization, incumbency, the likelihood of the minority party taking control of the chamber, and legislative performance--in a pooled time-series analysis. We find some support for the impact of the explanatory variables, particularly legislative institutionalization and incumbency. Finally, we present both descriptive and statistical evidence that the degree of constituency-level competition is decreasing during the time period under study.