The purpose of this paper is to analyze both theoretically and empirically the effect of selected government regulations on a high‐risk personal loan market. Unlike previous studies, which have generally relied on a loosely specified theory and then tested this theory with statewide aggregate data, our analysis is based on a more tightly specified model for individual loans which is then tested using statewide disaggregated data. The empirical results indicate that the regulatory effects are not only significant but consistent with our theoretical microeconomic model.