This chapter introduces the research questions and framework that guide the volume. Explaining that the volume aims to understand variation in patterns of patronage politics across Southeast Asia, what causes that variation, and how patronage politics works on the ground, it begins by conceptually untangling patronage and clientelism. The chapter defines patronage as a material resource disbursed for particularistic benefit and political purposes, and clientelism as a personalistic relationship of power. It distinguishes among three types of patronage (micro, meso, and macro), the first involving disbursement of benefits to individuals, the second to groups, and the third referring to large-scale programs that are “hijacked” for particularistic purposes. The chapter also stresses that politicians draw on different types of political networks when distributing patronage, producing a logic whereby different mixes of patronage and networks cohere as distinct “electoral mobilization regimes.” The chapter introduces three such regimes found in Indonesia, Malaysia, and the Philippines, and highlights the volume's theoretical contributions and scope and methods.