This paper reports on the microfinance program of Hatton National Bank Limited (HNB), the largest private commercial bank in Sri Lanka. It reviews the experience of HNB, which has initiated a program offering financial services to the poor while continuing its traditional business operations.

Group-based lending programs for the poor have become a focus of attention in the development community over the last several years. To date, there has been no comprehensive investigation of their impact on household behavior that has been sufficiently attentive to issues of endogeneity and...