There is a large body of research showing that the provision of social policies is higher under proportional electoral systems than under majoritarian systems. This article helps advance this literature by showing that the geographic distribution of social recipients plays an essential role in moderating the impact of electoral institutions on social provision. Using data from twenty-two OECD countries, the results show that majoritarian systems increase the provision of social spending when recipients are concentrated in certain regions. When levels of concentration are high, social spending in majoritarian countries can surpass levels of provision in proportional representation systems.Keywords: electoral systems; social spending; political geography; unemployment concentrationThe literature in political economy has shown that electoral rules are essential to explain the composition and levels of public spending across countries. In particular, many authors have argued that the provision of social policies will be higher in proportional representation (PR) electoral systems compared to majoritarian ones. However, a key assumption in most important theoretical works is that the population is homogeneous or perfectly segregated across districts. 1 Yet public policies have beneficiaries that are not necessarily homogeneously spread across territories. This means that the theoretical relationship between electoral rules and public spending might not generally hold. Our article contributes to developing these caveats by studying whether the effect of electoral rules on governments' provision of public spending is contingent on the geography of social recipients. More specifically, we hypothesize that the incentives to provide social spending in majoritarian systems will increase when social recipients are geographically concentrated. We test this argument with data on social spending in twenty-two OECD countries and find supportive evidence. The empirical evidence suggests that geographic clustering can bring social spending in majoritarian systems to levels equal to those in PR systems.This article speaks to recent developments in political economy that explore the role of economic and political geography in redistribution, representation and policy provision. 2 More specifically, our theoretical argument is in line with several studies that focus on the joint role of geography and electoral institutions in the provision of certain policies, such as trade, 3 * Department of Politics, University of York (email: ignacio.jurado@york.ac.uk); Department of Politics, University of York (email: sandra.leon@york.ac.uk). We would like to thank Francesc Amat, Joaquín Artés, Pablo Beramendi, Albert Falcó-Gimeno, Tim Hicks, David Rueda, Scott Siegel, and David Soskice for helpful comments on earlier versions of this project. This article has received financial support from the Spanish Ministry of Economy and Competitiveness: CSO2013-40870-R. Data replication sets are available at http://dataverse. harvard.edu/dataverse/BJPolS...