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1. To Charge or Not to Charge: Evidence from a Health Products Experiment in Uganda

Author:
Dean Karlan, Pia Raffler, Greg Fischer, and Margaret McConnell
Publication Date:
11-2014
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
In a field experiment in Uganda, we find that demand after a free distribution of three health products is lower than after a sale distribution. This contrasts with work on insecticide-treated bed nets, highlighting the importance of product characteristics in determining pricing policy. We put forward a model to illustrate the potential tension between two important factors, learning and anchoring, and then test this model with three products selected specifically for their variation in the scope for learning. We find the rank order of shifts in demand matches with the theoretical prediction, although the differences are not statistically significant.
Topic:
Development and Health
Political Geography:
Uganda and Africa

2. Savings by and for the Poor: A Research Review and Agenda

Author:
Dean Karlan, Jonathan Zinman, and Aishwarya Lakshmi Ratan
Publication Date:
11-2013
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
The poor can and do save, but often use formal or informal instruments that have high risk, high cost, and limited functionality. This could lead to undersaving compared to a world without market or behavioral frictions. Undersaving can have important welfare consequences: variable consumption, low resilience to shocks, and foregone profitable investments.
Topic:
Development, Economics, Globalization, International Trade and Finance, Markets, Poverty, and Financial Crisis

3. Hoping to Win, Expected to Lose: Theory and Lessons on Microenterprise Development

Author:
Dean Karlan, Ryan Knight, and Christopher Udry
Publication Date:
11-2012
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
We show how financial and managerial constraints impede experimentation and thus limit learning about the profitability of investments. Imperfect information about one's own type, but willingness to experiment to learn one's type, leads to short-run negative expected returns to investments, with some outliers succeeding. We find in an experiment that entrepreneurs invest randomized grants of cash and adopt advice from randomized grants of consulting services, but both lead to lower profits on average. In the long run, they revert back to their prior scale of operations. In a meta-analysis, results from 19 other experiments find mixed support for this theory.
Topic:
Development, Economics, Markets, Foreign Aid, and Foreign Direct Investment
Political Geography:
Africa

4. How Can Bill and Melinda Gates Increase Other People\'s Donations to Fund Public Goods?

Author:
Dean Karlan and John A. List
Publication Date:
04-2011
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
We develop a simple theory which formally describes how charities can resolve the information asymmetry problems faced by small donors by working with large donors to generate quality signals. To test the model, we conducted two large-scale natural field experiments. In the first experiment, a charity focusing on poverty reduction solicited donations from prior donors and either announced a matching grant from the Bill and Melinda Gates Foundation, or made no mention of a match. In the second field experiment, the same charity sent direct mail solicitations to individuals who had not previously donated to the charity, and tested whether naming the Bill and Melinda Gates Foundation as the matching donor was more effective than not identifying the name of the matching donor. The first experiment demonstrates that the matching grant condition generates more and larger donations relative to no match. The second experiment shows that providing a credible quality signal by identifying the matching donor generates even more and larger donations than not naming the matching donor. Importantly, the treatment effects persist long after the matching period, and the quality signal is quite heterogeneous—the Gates\' effect is much larger for prospective donors who had a record of giving to "poverty-oriented" charities. These two pieces of evidence support our model of quality signals as a key mechanism through which matching gifts inspire donors to give.
Topic:
Development, Government, Humanitarian Aid, Markets, and Foreign Aid
Political Geography:
United States

5. Water price policy analysis in China:An experimental approach

Author:
Jikun Huang, Qiuqiong Huang, Jinxia Wang, Jun Xia, Scott Rozelle, and Dean Karlan
Publication Date:
01-2007
Content Type:
Working Paper
Institution:
Walter H. Shorenstein Asia-Pacific Research Center
Abstract:
Water scarcity is one of the key problems that affect northern China, an area that covers 40 percent of the nation's cultivated area and houses almost half of the population. The water availability per capita in North China is only around 300 m per capita, which is less than one seventh of the national average (Ministry of Water Resources, 2002). At the same time, expanding irrigated cultivated area, the rapidly growing industrial sector and an increasingly wealthy urban population demand rising volumes of water (Crook, 2000, Wang, et al., 2005). As a result, groundwater resources are diminishing in large areas of northern China (Wang, et al., 2005). For example, between 1958 and 1998, groundwater levels in the Hai River Basin fell by up to 50 meters in some shallow aquifers and by more than 95 meters in some deep aquifers (Ministry of Water Resource, et al., 2001).
Topic:
Agriculture, Development, Environment, Government, and Industrial Policy
Political Geography:
China

6. Credit Elasticities in Less-Developed Economies: Implications for Microcredit

Author:
Dean Karlan and Jonathan Zinman
Publication Date:
01-2007
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Policymakers often prescribe that microfinance institutions increase interest rates to eliminate reliance on subsidies. This strategy makes sense if the poor are rate insensitive: then microlenders increase profitability (or achieve sustainability) without reducing the poor's access to credit. We test the assumption of price inelastic demand using randomized trials conducted by a consumer lender in South Africa. The demand curves are downward-sloping, and steep for price increases relative to the lender's standard rates. We also find that loan size is far more responsive to changes in loan maturity than to changes in interest rates, which is consistent with binding liquidity constraints.
Topic:
Development, Economics, and Markets
Political Geography:
Africa and South Africa

7. Observing Unobservables: Identifying Information Asymmetries with a Consumer Credit Field Experiment

Author:
Dean Karlan and Jonathan Zinman
Publication Date:
01-2007
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Information asymmetries are important in theory but difficult to identify in practice. We estimate the presence and importance of adverse selection and moral hazard in a consumer credit market using a new field experiment methodology. We randomized 58,000 direct mail offers issued by a major South African lender along three dimensions: 1) an initial "offer interest rate" featured on a direct mail solicitation; 2) a "contract interest rate" that was revealed only after a borrower agreed to the initial offer rate; and 3) a dynamic repayment incentive that extended preferential pricing on future loans to borrowers who remained in good standing. These three randomizations, combined with complete knowledge of the Lender's information set, permit identification of specific types of private information problems. Our setup distinguishes adverse selection from moral hazard effects on repayment, and thereby generates unique evidence on the existence and magnitudes of specific credit market frictions. We find evidence of moral hazard and weaker evidence for adverse selection. A rough calibration suggests that perhaps 7% to 16% of default is due to asymmetric information problems. Asymmetric information may help explain the prevalence of credit constraints even in a market that specializes in financing high-risk borrowers at very high rates.
Topic:
Civil Society, Development, Markets, and Poverty
Political Geography:
South Africa

8. Expanding Credit Access: Using Randomized Supply Decisions to Estimate the Impacts

Author:
Dean Karlan and Jonathan Zinman
Publication Date:
01-2007
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Expanding credit access is a key ingredient of development strategies worldwide. Microfinance practitioners, policymakers, and donors have ambitious goals for expanding access, and seek efficient methods for implementing and evaluating expansion. There is less consensus on the role of consumer credit in expansion initiatives. Some microfinance institutions are moving beyond entrepreneurial credit and offering consumer loans. But many practitioners and policymakers are skeptical about “unproductive” lending. These concerns are fueled by academic work highlighting behavioral biases that may induce consumers to overborrow. We estimate the impacts of a consumer credit supply expansion using a field experiment and follow-up data collection. A South African lender relaxed its risk assessment criteria by encouraging its loan officers to approve randomly selected marginal rejected applications. We estimate the resulting impacts using new survey data on borrower behavior and well-being, and administrative data on loan repayment. We find that the marginal loans increased credit access and produced measurable benefits in the form of increased employment, reduced hunger, and reduced poverty. The marginal loans also appear to have been profitable for the lender. The results must be interpreted with caution but suggest that consumer credit expansions can be welfare-improving.
Topic:
Development, Markets, and Poverty
Political Geography:
Africa and South Africa

9. Teaching Entrepreneurship: Impact of Business Training on Microfinance Clients and Institutions

Author:
Dean Karlan and Martin Valdivia
Publication Date:
01-2007
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Can one teach basic entrepreneurship skills, or are they fixed personal characteristics? Most academic and development policy discussions about microentrepreneurs focus on their access to credit, and assume their human capital to be fixed. The self-employed poor rarely have any formal training in business skills. However, a growing number of microfinance organizations are attempting to build the human capital of micro-entrepreneurs in order to improve the livelihood of their clients and help further their mission of poverty alleviation. Using a randomized control trial, we measure the marginal impact of adding business training to a Peruvian group lending program for female microentrepreneurs. Treatment groups received thirty to sixty minute entrepreneurship training sessions during their normal weekly or monthly banking meeting over a period of one to two years. Control groups remained as they were before, meeting at the same frequency but solely for making loan and savings payments. We find that the treatment led to improved business knowledge, practices and revenues. The program also improved repayment and client retention rates for the microfinance institution. Larger effects found for those that expressed less interest in training in a baseline survey. This has important implications for implementing similar market-based interventions with a goal of recovering costs.
Topic:
Development, Economics, Education, and Gender Issues

10. Female Empowerment: Impact of a Commitment Savings Product in the Philippines

Author:
Dean Karlan, Wesley Yin, and Nava Ashraf
Publication Date:
01-2007
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Female “empowerment” has increasingly become a policy goal, both as an end to itself and as a means to achieving other development goals. Microfinance in particular has often been argued, but not without controversy, to be a tool for empowering women. Here, using a randomized controlled trial, we examine whether access to an individually-held commitment savings product leads to an increase in female decision-making power within the household. We find positive impacts, particularly for women who have below median decision-making power in the baseline, and we find this leads to a shift towards female-oriented durables goods purchased in the household.
Topic:
Development, Economics, and Gender Issues
Political Geography:
Southeast Asia