Working Papers

Risk Aversion and Barriers to Firm Growth: Experimental Evidence from Small Retailers
Job Market Paper
Paper

Firms in low and middle-income economies often grow slowly. This paper examines whether firm risk aversion prevents risk taking necessary to grow. While economists tend to model firms as risk neutral, I posit that this assumption is unlikely to hold for the modal developing country firm, which is owner-operated, so that uncertain investments may directly threaten owners’ consumption. I develop a model that shows how risk aversion can reduce firms’ willingness to experiment with new technologies, impeding investment and growth. I test the model’s predictions within the context of retail firms’ decision to adopt and sell a new consumer product using two field experiments with over 1,200 Kenyan firms. First, offering firms an insurance contract that creates a mean-preserving contraction of profits increases new product adoption by 50%. Effects are concentrated among firms whose owners exhibit higher levels of risk aversion. Second, temporarily inducing firms to try selling a new product with a supplier returns policy leads to a 70% increase in stock purchases after the intervention ends. Third, consistent with bandit models of learning, experimentally increasing the continuation value of learning increases adoption by 80%. These persistent effects arise through a reduction in the variance of beliefs, rather than through changes in mean beliefs. These results show that a feature inherent to developing country environments – small firms in the presence of missing financial markets – itself creates a barrier to firm innovation and growth.

A New Experimental Method for Estimating Demand for Non-market Goods: With an Application to the Value of a Statistical Life
Paper

This paper introduces a new method for estimating demand for non-market goods and applies it to the value of a statistical life (VSL) in Kenya. The approach updates beliefs about the life-saving efficacy of a product (helmets) and elicits product choice. This allows demand to be estimated from subjective beliefs rather than assuming rational expectations. The resulting VSL estimate is $224, near the lower end of Kenyan estimates. Standard methods produce skewed results, driven by violations of rational expectations. The findings help explain weak demand for preventive health and suggest that redirecting some development aid toward consumption could raise welfare.

Can Cash Transfers Save Lives? Evidence from a Large-Scale Experiment in Kenya
with Michael Walker, Nick Shankar, Edward Miguel and Dennis Egger
Paper

We estimate the impacts of large-scale unconditional cash transfers on child survival. One-time transfers of USD 1000 were provided to over 10,500 poor households across 653 randomized villages in Kenya. We collected census data on over 100,000 births, including on mortality and cause of death, and detailed data on household health behaviors. Unconditional cash transfers (accounting for spillovers) lead to 48% fewer infant deaths before age one and 45% fewer child deaths before age five. Detailed data on cause of death, transfer timing relative to birth, and the location of health facilities indicate that unconditional cash transfers and access to delivery care are complements in generating mortality reductions: the largest gains are estimated in neonatal and maternal causes of death largely preventable by appropriate obstetric care and among households living close to physician-staffed facilities and those who receive the transfer around the time of birth, and treatment leads to a large increase in hospital deliveries (by 45%). The infant and child mortality declines are concentrated among poorer households with below median assets or predicted consumption. The transfers also result in a substantial decline of 51% in female labor supply in the three months before and the three months after a birth, and improved child nutrition. Infant and child mortality largely revert to pre-program levels after cash transfers end. Despite not being the main aim of the original program, we show that unconditional cash transfers in this setting may be a cost-effective way to reduce infant and child deaths.

Publications

Using satellites and phones to evaluate and promote agricultural technology adoption: Evidence from smallholder farms in India
with Shawn Cole, Aparna Krishna and Tomoko Harigaya. Journal of Development Economics.
Paper

This paper evaluates a low-cost, customized soil nutrient management advisory service in India. As a methodological contribution, we examine whether and in which settings satellite measurements may be effective at estimating both agricultural yields and treatment effects. The intervention improves self-reported fertilizer management practices, though not enough to measurably affect yields. Satellite measurements calibrated using OLS produce more precise point estimates than farmer-reported data, suggesting power gains. However, linear models, common in the literature, likely produce biased estimates. We propose an alternative procedure, using two-stage least squares. In settings without attrition, this approach obtains lower statistical power than self-reported yields; in settings with differential attrition, it may substantially increase power. We include a “cookbook” and code that should allow other researchers to use remote sensing for yield estimation and program evaluation.

Work in Progress

Free-Riding and New Product Adoption: Evidence from Burundi
Data collection in process with Luisa Cefala, Rédempteur Ntawiratsa and Nicholas Swanson

In low and middle-income (LMIC) countries, businesses often use technologies inside the frontier, innovate less, and slowly adopt new products and technologies (Cirera et al. 2022). The reasons for these facts are not well understood, particularly for small and microenterprises (e.g. Atkin et al. 2017). We investigate whether a lack of institutions to protect the value of intellectual property contributes to these facts. High-income economies tend to have strong patent systems to promote discoveries, and regulators permit exclusive dealing in retail environments due to similar forces. But LMIC firms are often informal and undifferentiated, meaning neighbours are likely to adopt discoveries of their competitors without compensation. This project focuses on this problem in the case of retail firms’ decision to adopt a new product-- a setting where firms face risk ex-ante because they do not know if demand will exist, but, ex-post, competitors can learn if demand is high by observing the first mover. We examine whether offering retailers exclusive access to supply of a new product promotes adoption. Our study also tests whether firms are colluding so that if there is a null result we can understand if it is due to collusion, a possible upside to the finding that some markets in LMICs are uncompetitive (Bergquist and Dinerstein 2020).

Multiple Missing Markets and Allocative Efficiency
with Supreet Kaur
The Long-run Effects of Unconditional Cash Transfers: Evidence from the Kenya General Equilibrium Study
with Dennis Egger, Edward Miguel and Michael Walker

Recent studies document positive short-run effects of unconditional cash transfers (UCTs) on cash recipients and spillover effects on non-recipients. But modest sample sizes and challenges with tracking households over time have limited research on the long-run effects of UCTs. We study the long-run effects of the Kenya General Equilibrium Study (KGES) on recipient households and the local economy using census and survey data collected up to ten years post-transfers. An “endline 2” completed 4-7 years after the transfers collected census data from each household and enterprise in the study area, and a representative survey of more than 10,000 households and firms obtained more detailed consumption and production measures for a subset, including from those that migrated out of the study area. We collected this same information in an “endline 3” completed 7-10 years after the experimental start. Preliminary results from endline 2 show persistent consumption gains among recipients and expansion of non-farm enterprise revenue. Ongoing analysis examines whether these effects persisted to endline 3 and aims to estimate long-run transfer multipliers.