W hat shapes politicians' strategies in political systems where pork, rather than programmatic platforms, wins elections? We argue that resource control provides much of the answer, as politics in pork-centric systems will in large part be organized around actors who control access to pork. We use new national and subnational data from Brazil and Japan to show how the degree of centralization of resources can affect party affiliation patterns. We find that in decentralized Brazil, both national and subnational politicians join parties that control their subnational government. In contrast, in our analysis of centralized Japan, politicians at both national and subnational levels base their party affiliation decisions on national-level partisan considerations. P ork-barrel politics is a defining feature of electoral competition in many established democracies and, even more frequently, new democracies. However, because most theories of political parties focus on spatial competition, political science has not yet fully developed a framework for understanding political strategies in systems that are dominated by pork.By definition, in pork-oriented systems it is important for politicians to deliver private and local public goods to their constituents. As a result, those who control access to these goods have substantial influence over political actors. In this way, the institutions that assign control over state resources are likely to shape power relations and the incentives that drive political behavior throughout the system, and different patterns of resource control ought to lead politicians to pursue different career strategies. Comparative Politics Workshop, and the editors and four reviewers at the APSR. We thank Caitlin Milazzo for her research assistance. We thank Jun Saito, Rob Weiner, Ryota Natori, and Yusaku Horiuchi for their (leading) role in creating the JERRY data set on prefectural assembly members in Japan, and Rob Weiner for sharing his data on prefectural governors in Japan, upon which the bulk of the Japan subnational data analysis was based. The information on party switching at the prefectural level in Japan was drawn from the kaiha/party listings for each prefectural legislator in Yomiuri Shinbun (various years). The information on district overlap between national and subnational politicians in Japan was drawn from Yomiuri Shinbun (various years) and Miyakawa (1994). may be widely evident in political systems, affecting career paths, roll-call votes, coalition formation, and, the focus of this paper, party affiliation.We provide suggestive evidence about the relationship between resource decentralization and party system organization, examining national and subnational legislatures in Brazil and Japan. These two cases share many similar features, including a strong pork-barrel orientation, but in Brazil, control over pork allocation is significantly decentralized, whereas in Japan it is highly centralized. The implication is that national and subnational legislators in Brazil should be orient...