Mapping the Consequences of Electoral Reform

A number of incremental electoral reforms have not measurably improved government performance in California. In this research note, we simulate and map electoral outcomes under a simple form of proportional representation: 16 five-seat districts for the 80-seat California Assembly. In addition to eliminating the institutional advantage that the largest party receives under the current system, our simulation suggests that PR would diversify the composition of both major parties, and provide limited opportunities for minor parties to effectively compete throughout the state. We demonstrate the usefulness of applying electoral systems theory as a test of claims about the consequences of reform.