Production costs and input substitution in Zimbabwe's smallholder agriculture
In this study, we estimate production costs and elasticities of factor substitution for Zimbabwean smallholders, using a dual (cost function) approach with detailed data on prices paid and received by each of 65 farms across six survey sites over two years. We find that 95% of observed farm choices are consistent with optimal input use, and that there is moderate substitutability between labor, biochemical inputs and capital. These results indicate that farmers can substitute between factors as relative prices change, particularly to increase labor use as the rural population grows. By stratifying our sample, we investigate the degree to which production costs differ among the socioeconomic groups, tsting for higher costs among female-headed households (who might be subject to gender discrimination), resource-poor farmers without their own draft animals (who might have less timely operations), and isolated farms far from paved roads (who might have less access to markets and information). We find significant support only for the paved-roads effect, indicating the importance of rural infrastracture in determining production costs.
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- Heckman, James J, 1979.
"Sample Selection Bias as a Specification Error,"
Econometric Society, vol. 47(1), pages 153-161, January.
- Blackorby, Charles & Russell, R Robert, 1989. "Will the Real Elasticity of Substitution Please Stand Up? (A Comparison of the Allen/Uzawa and Morishima Elasticities)," American Economic Review, American Economic Association, vol. 79(4), pages 882-888, September.
- Massell, Benton F., 1967. "Farm Management in Peasant Agriculture: An Empirical Study," Food Research Institute Studies, Stanford University, Food Research Institute, issue 02.
- Farman Ali & Ashok Parikh, 1992. "Relationships among Labor, Bullock, and Tractor Inputs in Pakistan Agriculture," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 74(2), pages 371-377.
- Hirofumi Uzawa, 1962. "Production Functions with Constant Elasticities of Substitution," Review of Economic Studies, Oxford University Press, vol. 29(4), pages 291-299.
- Chambers,Robert G., 1988. "Applied Production Analysis," Cambridge Books, Cambridge University Press, number 9780521314275, May.
- Massell, Benton F. & Johnson, R.W.M., 1968. "Economics of Smallholder Farming in Rhodesia: A Cross-Section Analysis of Two Areas," Food Research Institute Studies, Stanford University, Food Research Institute.
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