Spatial patterns of crop yields in Latin America and the Caribbean:
"From a theoretical perspective crop yields should tend to converge over time and space as: growth in yield potential exhibits diminishing returns; an increasing share of farmers shift to using high yielding varieties (HYVs); barriers to the free flow of knowledge and information are removed; and significant investments continue to be made in supporting institutions whose mandates include facilitating and accelerating the cross-border flow of improved agricultural technologies. Using a new, sub-national crop yield database for Latin America and the Caribbean (LAC) we examine whether convergence is indeed occurring, and discover it is not. On the contrary, there is evidence of divergence. We test three hypotheses that might help account for this finding: that technology generation has been biased towards production in more-favored production systems leaving behind persistent pockets of production in more marginal lands; that rainfall patterns have changed in ways that exacerbate yield divergence, and that technology spillover across borders remains more problematic than within-country spillover. We find evidence to support all three of these hypotheses. Further work is needed to assess the relative importance of these sources of yield divergence both across and within LAC. As anticipated, rainfall variability is poorly linked to the variability of irrigated crop yields, but more strongly linked to variability in rainfed crops. The results suggest while some countries and regions within countries forge ahead with crop yield improvements there are many areas, often in smaller countries, where the livelihoods of many farmers - and likely a disproportionate share of LAC's rural poor - continue to be constrained by low-productivity agriculture. There remains significant work ahead for national governments and for publicly-funded regional and international agricultural technology institutions to remedy this situation. " Authors' Abstract
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- Shorrocks, A F, 1980. "The Class of Additively Decomposable Inequality Measures," Econometrica, Econometric Society, vol. 48(3), pages 613-625, April.
- Shenggen Fan & Peter Hazell & Sukhadeo Thorat, 2000. "Government Spending, Growth and Poverty in Rural India," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 82(4), pages 1038-1051.
- Wood, Stanley & Pardey, Philip G., 1998. "Agroecological aspects of evaluating agricultural R&D," Agricultural Systems, Elsevier, vol. 57(1), pages 13-41, May.
- Shorrocks, Anthony F, 1984. "Inequality Decomposition by Population Subgroups," Econometrica, Econometric Society, vol. 52(6), pages 1369-1385, November.
- Mills, Jeffrey A & Zandvakili, Sourushe, 1997.
"Statistical Inference via Bootstrapping for Measures of Inequality,"
Journal of Applied Econometrics,
John Wiley & Sons, Ltd., vol. 12(2), pages 133-150, March-Apr.
- Jeffrey A. Mills & Sourushe Zandvakili, 1999. "Statistical Inference via Bootstrapping for Measures of Inequality," Macroeconomics 9902003, EconWPA.
- Pardey, Philip G. & Alston, Julian M. & Chan-Kang, Connie & Magalhaes, Eduardo C. & Vosti, Stephen A., 2004. "Assessing and attributing the benefits from varietal improvement research in Brazil:," Research reports 136, International Food Policy Research Institute (IFPRI).
- Pender, John L. & Scherr, Sara J., 1999. "Organizational development and natural resource management: evidence from central Honduras," EPTD discussion papers 49, International Food Policy Research Institute (IFPRI).
- Alston, Julian M. & Pardey, Philip G. & Roseboom, Johannes, 1998. "Financing agricultural research: International investment patterns and policy perspectives," World Development, Elsevier, vol. 26(6), pages 1057-1071, June.
- X. Zhang & R. Kanbur, 2001. "What Difference Do Polarisation Measures Make? An Application to China," Journal of Development Studies, Taylor & Francis Journals, vol. 37(3), pages 85-98.
- Zhang, Siao-Bo & Kanbur, Ravi, 1999. "What Difference Do Polarization Measures Make? An Application To China," Working Papers 7224, Cornell University, Department of Applied Economics and Management.
- Biewen, Martin, 2002. "Bootstrap inference for inequality, mobility and poverty measurement," Journal of Econometrics, Elsevier, vol. 108(2), pages 317-342, June. Full references (including those not matched with items on IDEAS)