Informal groups cannot rely on external enforcement to insure that members abide by their obligations. It is generally assumed that these problems are solved by 'social sanctions' and reputational effects. The present paper focuses on roscas, one of the most commonly found informal financial...

Group loans with joint liability are a distinguishing feature of many microfinance programs. While such lending benefits millions of borrowers, major lending institutions acknowledge its limited impact among the very poor and have shifted towards individual loans. This paper attempts to explain...