Publication: Microfinance Games
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Date
2010
ISSN
19457782
Published
2010
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Microfinance banks use group-based lending contracts to strengthen borrowers' incentives for diligence, but the contracts are vulnerable to free-riding and collusion. We systematically unpack microfinance mechanisms through ten experimental games played in an experimental economics laboratory in urban Peru. Risk-taking broadly conforms to theoretical predictions, with dynamic incentives strongly reducing risk-taking even without group-based mechanisms. Group lending increases risk-taking, especially for risk-averse borrowers, but this is moderated when borrowers form their own groups. Group contracts benefit borrowers by creating implicit insurance against investment losses, but the costs are borne by other borrowers, especially the most risk averse.
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Publication Microfinance Games(World Bank, Washington, DC, 2006-07)Microfinance has been heralded as an effective way to address imperfections in credit markets. But from a theoretical perspective, the success of microfinance contracts has puzzling elements. In particular, the group-based mechanisms often employed are vulnerable to free-riding and collusion, although they can also reduce moral hazard and improve selection. The authors created an experimental economics laboratory in a large urban market in Lima, Peru and over seven months conducted 11 different games that allow them to unpack microfinance mechanisms in a systematic way. They find that risk-taking broadly conforms to predicted patterns, but that behavior is safer than optimal. The results help to explain why pioneering microfinance institutions have been moving away from group-based contracts.Publication Microfinance Meets the Market(2009)In this paper, we examine the economic logic behind microfinance institutions and consider the movement from socially oriented nonprofit microfinance institutions to for-profit microfinance. Drawing on a large dataset that includes most of the world's leading microfinance institutions, we explore eight questions about the microfinance "industry": Who are the lenders? How widespread is profitability? Are loans in fact repaid at the high rates advertised? Who are the customers? Why are interest rates so high? Are profits high enough to attract profit-maximizing investors? How important are subsidies? The evidence suggests that investors seeking pure profits would have little interest in most of the institutions we see that are now serving poorer customers. We will suggest that the future of microfinance is unlikely to follow a single path. The recent clash between supporters of profit-driven Banco Compartamos and of the Grameen Bank with its "social business" model offers us a false choice. Commercial investment is necessary to fund the continued expansion of microfinance, but institutions with strong social missions, many taking advantage of subsidies, remain best placed to reach and serve the poorest customers, and some are doing so at a massive scale. The market is a powerful force, but it cannot fill all gaps.Publication Does Regulatory Supervision Curtail Microfinance Profitability and Outreach?(2011)Regulation allows microfinance institutions to take deposits and expand their banking functions, but complying with regulation can be costly. We examine implications for institutions' profitability and their outreach to small-scale borrowers and women, using a newly-constructed dataset on 245 leading institutions. Controlling for the non-random assignment of supervision via treatment effects and instrumental variables regressions, we find evidence consistent with the hypothesis that profit-oriented microfinance institutions respond to supervision by maintaining profit rates but curtailing outreach to women and customers that are costly to reach. Institutions with a weaker commercial focus instead tend to reduce profitability but maintain outreach.Publication Access to Capital in Rural Thailand: An Estimated Model of Formal vs Informal Credit(2011)This paper analyzes the mechanism underlying access to credit, focusing on two important aspects of rural credit markets. First, moneylenders and other informal lenders coexist with formal lending institutions such as government or commercial banks, and, more recently, micro-lending institutions. Second, potential borrowers presumably face sizable transaction costs in obtaining external credit. We develop and estimate a model based on limited enforcement and transaction costs that provides a unified view of these facts. Based on data from Thailand, the results show that the limited ability of banks to enforce contracts, more than transaction costs, is crucial in understanding the observed diversity of lenders.Publication Identification Strategy : A Field Experiment on Dynamic Incentives in Rural Credit Markets(2010-10-01)How do borrowers respond to improvements in a lender's ability to punish defaulters? This paper reports the results of a randomized field experiment in rural Malawi that examines the impact of fingerprinting borrowers in a context where a unique identification system is absent. Fingerprinting allows the lender to more effectively use dynamic repayment incentives: withholding future loans from past defaulters while rewarding good borrowers with better loan terms. Consistent with a simple model of borrower heterogeneity and information asymmetries, fingerprinting led to substantially higher repayment rates for borrowers with the highest ex ante default risk, but had no effect for the rest of the borrowers. The change in repayment rates is driven by reductions in adverse selection (smaller loan sizes) and lower moral hazard (for example, less diversion of loan-financed fertilizer from its intended use on the cash crop).
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