How do electoral institutions affect legislative behavior? Though a large body of theoretical scholarship posits a negative relationship between multimember districting and the provision of particularistic goods, empirical scholarship has found little evidence in support of this expectation. Using data on the provision of US post offices from 1876 to 1896, a period during which many states elected congressional representatives from at-large districts, and a differences-in-differences approach, I find that counties represented by at-large representatives received approximately 8% fewer post offices. The results have important implications for studying how electoral institutions affect incentives for legislative behavior.How do elected officials represent their constituencies? In designing the American system of government, the Founders paid close attention to how institutional structures would provide incentives for legislative behavior. For instance, in Federalist 52, Madison wrote that "frequent elections are unquestionably the only policy" by which members of the House of Representatives would "have an immediate dependence on, and an intimate sympathy with, the people." A wide range of electoral institutions, including term limits (e.g., Bernhardt,