摘要:This research addresses the question of what factors influence policy responsiveness by members of Congress. Data from the 95th and 96th sessions of Congress and the 1978 American National Election Study are employed to test two possible influences on policy responsiveness. First, a revised test of the marginality hypothesis is offered. Instead of looking at marginality statically, the change in both policy responsiveness and marginality is examined. This dynamic model receives no support from the data. Second, the hypothesis that a homogenous opinion structure within the district encourages greater policy responsiveness finds modest support.