NBER Publications by Jonathan Robinson

Using data from a field experiment in Kenya, we document that providing individuals with simple informal savings technologies can substantially increase investment in preventative health and reduce vulnerability to health shocks. Simply providing a safe place to keep money was sufficient to increase health savings, through a mental accounting effect. Adding an earmarking feature was only helpful when funds were put towards emergencies; earmarking for preventative health reduced savings on average, because the liquidity cost of tying up money was too great. Providing social pressure and credit through a ROSCA-based savings scheme had very large effects.

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, ...

To what extent does the lack of access to formal financial services impede business growth in low-income countries? While most research on this issue has so far focused on credit market failures, this paper focuses on the role of access to formal saving services. We conducted a field experiment in which a randomly selected sample of self-employed individuals in rural Kenya got access to an interest-free bank account. As the bank charged substantial withdrawal fees, the de facto interest rate on the account was negative. Despite this, take-up and usage of the account was high among market vendors, especially women. Access to an account had a substantial, positive impact on levels of productive investments among market women, and, within 6 months, led to higher income levels, as proxied by e...