Serving Two Masters: Using Referenda to Assess Partisan versus Dyadic Legislative Representation

Studies comparing the ideological leanings of voters and elected officials are often hampered by the lack of a common measure. The authors use legislative referenda—on which state legislators and voters both vote on the same issue—as bridging observations to develop a common measure for both. They use this measure to help assess two theories of legislative representation, the well-known dyadic model and a partisan model that assumes legislators are also accountable to a collective party agenda. Examining referenda votes during several sessions of the California Assembly, the authors report several findings that are consistent with the partisan model. They find that legislators are significantly more ideologically extreme than the median voter in their districts. They also find that members of the majority party are considerably more extreme relative to their districts than members of the minority party are and that the majority party becomes even more extreme the longer it maintains control of the chamber.