Esther Duflo

Schooling and Labor Market Consequences of School Construction in Indonesia: Evidence from an Unusual Policy Experiment

Between 1973 and 1978, the Indonesian Government constructed over 61,000 primary schools throughout the country. This is one of the largest school construction programs on record. I evaluate the effect of this program on education and wages by combining differences across regions in the number of schools constructed with differences across cohorts induced by the timing of the program. The estimates suggest that the construction of primary schools led to an increase in education and earnings. Children ages 2 to 6 in 1974 received 0.12 to 0.19 more years of education for each school constructed per 1,000 children in their region of birth. Using the variations in schooling generated by this policy as instrumental variables for the impact of education on wages generates estimates of economic returns to education ranging from 6.8 percent to 10.6 percent.

Grandmothers and Granddaughters: Old-Age Pensions and Intrahousehold Allocation in South Africa

This article evaluates the impact of a large cash transfer program in South Africa on childrens nutritional status and investigates whether the gender of the recipient affects that impact. In the early 1990s the benefits and coverage of the South African social pension program were expanded for the black population. In 1993 the benefits were about twice the median per capita income in rural areas. More than a quarter of black South African children under age five live with a pension recipient. Estimates suggest that pensions received by women had a large impact on the anthropometric status (weight for height and height for age) of girls but little effect on that of boys. No similar effect is found for pensions received by men. This suggests that the efficiency of public transfer programs may depend on the gender of the recipient.

The Miracle of Microfinance? Evidence from a Randomized Evaluation

Microcredit has spread extremely rapidly since its beginnings in the late 1970s, but whether and how much is helps the poor is the subject of intense debate. This paper reports on the …rst randomized evaluation of the impact of introducing microcredit in a new market. Half of 104 slums in Hyderabad, India were randomly selected for opening of an MFI branch while the remainder were not. We show that the intervention increased total MFI borrow.

Growth Theory through the Lens of Development Economics

Growth theory has traditionally assumed the existence of an aggregate production function, whose existence and properties are closely tied to the assumption of optimal resource allocation within each economy. We show extensive evidence, culled from the micro-development literature, demonstrating that the assumption of optimal resource allocation fails radically. The key fact is the enormous heterogeneity of rates of return to the same factor within a single economy, a heterogeneity that dwarfs the cross-country heterogeneity in the economy-wide average return. Prima facie, we argue, this evidence poses problems for old and new growth theories alike. We then review the literature on various causes of this misallocation. We go on to calibrate a simple model which explicitly introduces the possibility of misallocation into an otherwise standard growth model. We show that, in order to match the data, it is enough to have misallocated factors: there also needs to be important fixed costs in production. We conclude by outlining the contour of a possible non-aggregate growth theory, and review the existing attempts to take such a model to the data.

Nudging Farmers to Use Fertilizer: Theory and Experimental Evidence from Kenya

While many developing-country policymakers see heavy fertilizer subsidies as critical to raising agricultural productivity, most economists see them as distortionary, regressive, environmentally unsound, and argue that they result in politicized, inefficient distribution of fertilizer supply. We model farmers as facing small fixed costs of purchasing fertilizer, and assume some are stochastically present-biased and not fully sophisticated about this bias. Even when relatively patient, such farmers may procrastinate, postponing fertilizer purchases until later periods, when they may be too impatient to purchase fertilizer. Consistent with the model, many farmers in Western Kenya fail to take advantage of apparently profitable fertilizer investments, but they do invest in response to small, time-limited discounts on the cost of acquiring fertilizer (free delivery) just after harvest. Later discounts have a smaller impact, and when given a choice of price schedules, many farmers choose schedules that induce advance purchase. Calibration suggests such small, time-limited discounts yield higher welfare than either laissez faire or heavy subsidies by helping present-biased farmers commit to fertilizer use without inducing those with standard preferences to substantially overuse fertilizer.

What Is Middle Class about the Middle Classes around the World

This paper uses household surveys from 13 developing countries to describe consumption choices, health and education investments, employment patterns and other features of the of the economic lives of the “middle classes” defined as those whose daily consumption per capita is between

Do Firms Want to Borrow More? Testing Credit Constraints Using a Directed Lending Program

2 and

Incentives Work: Getting Teachers to Come to School

4 or between

Pitfalls of Participatory Programs: Evidence from a Randomized Evaluation in Education in India

6 and

Improving immunisation coverage in rural India: clustered randomised controlled evaluation of immunisation campaigns with and without incentives

10. The data shed lights on differences and similarities between the middle classes and the poor and helps discriminating between various theories of the role of the middle classes in the development process. We find that the average middle class person is not an entrepreneur in waiting: while he or she might run a business, this is usually a small, not very profitable business. The single most important characteristic of the middle class seems to be that they are more likely to be holding a steady job. Perhaps as a result, they also have fewer, healthier, and better educated children. While there are clear differences in consumption patterns between the poor and the middle classes, there are also very strong resemblance within countries, and contrasts across countries, which might either reflect the importance of relative prices in shaping consumption decisions or the power of norms/fashions in determining consumption.