ELECTIONS IN DOUBLE-MEMBER DISTRICTS WITH NONSEPARABLE VOTER PREFERENCES

We derive Nash equilibrium candidate strategies in a double-member dis trict election when voters have nonseparable preferences for candidate s in a single-dimensional policy space. When candidates are elected si multaneously, nonseparable voter preferences create multiple equilibri a, including some in which candidates adopt extreme positions. The res ults are robust to limited voter uncertainty about candidate interacti on in the legislature. Nonseparable voter preferences create incentive s for the formation of political parties and disincentives for candida tes to moderate their positions.