Vote-buying, or influencing voters’ decisions through favors or gifts, is pervasive in areas such as Latin America, Africa, and Southeast Asia. UC Berkeley’s Frederico Finan, the TC Liu Distinguished Visitor at BFI, discusses his work studying how vote-buying unfolds on the ground in Paraguay. Finan describes how norms of reciprocity drive voters to opt for politicians who have treated them favorably in the past, and offers advice for how policymakers might disrupt this process to combat election fraud.