This chapter critically surveys recent advances in the methodology of measuring corruption in the field. The issue of measurement is central in the corruption literature, and the choice of method can significantly influence our thinking about the determinants, the mechanics, and the impact of corruption on the economy. We provide a conceptual categorization of different methods of measuring corruption ranging from surveys to direct observation of bribe payments in the field, while discussing the methodological and conceptual advantages and disadvantages of each method. Finally, we highlight areas of complementarity across methods and discuss avenues for future research.