Nudging Farmers to Utilize 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.
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- David Laibson & Andrea Repetto & Jeremy Tobacman, 2007.
"Estimating Discount Functions with Consumption Choices over the Lifecycle,"
Documentos de Trabajo
236, Centro de Economía Aplicada, Universidad de Chile.
- David Laibson & Andrea Repetto & Jeremy Tobacman, 2007. "Estimating Discount Functions with Consumption Choices over the Lifecycle," NBER Working Papers 13314, National Bureau of Economic Research, Inc.
- David Laibson & Andrea Repetto & Jeremy Tobacman, 2005. "Estimating Discount Functions with Consumption Choices over the Lifecycle," Levine's Bibliography 784828000000000643, UCLA Department of Economics.
- Michael Morris & Valerie A. Kelly & Ron J. Kopicki & Derek Byerlee, 2007. "Fertilizer Use in African Agriculture : Lessons Learned and Good Practice Guidelines," World Bank Publications, The World Bank, number 6650, September.
- Gulati, Ashok & Narayanan, Sudha, 2003. "The Subsidy Syndrome in Indian Agriculture," OUP Catalogue, Oxford University Press, number 9780195662061, March.
- Esther Duflo & Michael Kremer & Jonathan Robinson, 2008. "How High Are Rates of Return to Fertilizer? Evidence from Field Experiments in Kenya," American Economic Review, American Economic Association, vol. 98(2), pages 482-88, May.
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