Abstract
We derive Nash equilibrium candidate strategies in a double-member district election when voters have nonseparable preferences for candidates in a single-dimensional policy space. When candidates are elected simultaneously, nonseparable voter preferences create multiple equilibria, including some in which candidates adopt extreme positions. The results are robust to limited voter uncertainty about candidate interaction in the legislature. Nonseparable voter preferences create incentives for the formation of political parties and disincentives for candidates to moderate their positions.
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