In the next ten years, advocates of microfinance organizations (MFOs) will seek more than $20 billion to provide small loans to 100 million of the poorest families worldwide. In the United States, the newest federal budget proposes a 159-percent increase in the about $200 million spent per year...

Wide agreement about the goal of microfinance--to improve the welfare of the poor--has not led to wide agreement about how best to achieve that goal. To aid discussion, I propose a framework for outreach--the social benefits of microfinance--in terms of six aspects: worth, cost, depth, breadth,...

We examine a simple bargaining setting, where heterogeneous buyers and sellers are repeatedly matched with each other. We begin by characterizing efficiency in such a dynamic setting, and discuss how it differs from efficiency in a centralized static setting. We then study the allocations which...

Despite wide recognition of their significant role in explaining sustained growth and economic development, uncompensated knowledge spillovers have not yet been fully modeled with a microeconomic foundation. This paper illustrates the exchange of knowledge as well as its consequences for...