A spatial analysis of candidate competition in dual member districts: The 1989 Chilean senatorial elections

This study uses empirical spatial theory to evaluate candidate and Voter be havior in senate elections contested during the 1989 Chilean general electi on. The study evaluates whether senatorial candidates competing in dual mem ber districts under Chilean d'Hondt locate near the periphery or interior o f the electoral space. Spatial analyses demonstrate the Chilean senatorial electoral system is characterized by centrifugal forces. In particular, can didates of the right locate on the periphery of the space and face few ince ntives to pursue moderate electoral strategies. The study also characterize s bases of party and candidate support and the underlying dimensions of pol itical competition. Spatial analysis reveals both change and continuity in the pre- and post-authoritarian electoral universes.