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A Tale of Two Countries: Spatial and Temporal Patterns of Rice Productivity in China and Brazil

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  • You, Liangzhi

Abstract

This paper looks at differences in spatial and temporal variation of rice yields in China and Brazil. We find that rice yields in China have converged over time and that rice production has become more and more homogeneous. In contrast, rice yields in Brazil have diverged over time, primarily due to variations in upland rice yields. Three hypotheses are put forward to explain the different behaviour of rice yields in Brazil and China: (i) differences in production systems (i.e., irrigated in China versus upland in Brazil); (ii) changes in rainfall patterns and (iii) bias in agricultural R&D favouring irrigated rice. Our empirical analysis provides support to the first two hypotheses by establishing that upland rice is subjected to much greater variation in yields than irrigated rice and that changing rainfall patterns affect mostly upland rice. We also provide evidence of the bias towards irrigated systems by looking at the patterns of varietal release.

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File URL: http://www.wider.unu.edu/stc/repec/pdfs/rp2008/rp2008-30.pdf
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Bibliographic Info

Paper provided by World Institute for Development Economic Research (UNU-WIDER) in its series Working Paper Series with number RP2008/30.

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Length: 20 pages
Date of creation: 2008
Date of revision:
Handle: RePEc:unu:wpaper:rp2008-30

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Keywords: rice productivity; spatial convergence; technology spillover; China; Brazil;

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  1. Philip G. Pardey & Julian M. Alston & Connie Chan-Kang & Eduardo C. Magalh�es & Stephen A. Vosti, 2006. "International and Institutional R&D Spillovers: Attribution of Benefits among Sources for Brazil's New Crop Varieties," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 88(1), pages 104-123.
  2. Carter, Colin A. & Zhang, Bin, 1998. "The Weather Factor and Variability in China's Grain Supply," Journal of Comparative Economics, Elsevier, vol. 26(3), pages 529-543, September.
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  4. Kanbur, Ravi & Zhang, Xiaobo, 2001. "Fifty Years of Regional Inequality in China: A Journey through Revolution, Reform and Openness," CEPR Discussion Papers 2887, C.E.P.R. Discussion Papers.
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  6. Timo Goeschl & Timothy Swanson, 2000. "Genetic use restriction technologies and the diffusion of yield gains to developing countries," Journal of International Development, John Wiley & Sons, Ltd., vol. 12(8), pages 1159-1178.
  7. Shenggen Fan & Connie Chan-Kang & Keming Qian & K. Krishnaiah, 2005. "National and international agricultural research and rural poverty: the case of rice research in India and China," Agricultural Economics, International Association of Agricultural Economists, vol. 33(s3), pages 369-379, November.
  8. Shorrocks, Anthony F, 1984. "Inequality Decomposition by Population Subgroups," Econometrica, Econometric Society, vol. 52(6), pages 1369-85, November.
  9. Stanley Wood & Liangzhi You & Xiaobo Zhang, 2004. "Spatial Patterns of Crop Yields in Latin America and the Caribbean," Latin American Journal of Economics-formerly Cuadernos de Economía, Instituto de Economía. Pontificia Universidad Católica de Chile., vol. 41(124), pages 361-381.
  10. Xiaobo Zhang & Shenggen Fan & Ximing Cai, 2002. "The Path Of Technology Diffusion: Which Neighbors To Learn From?," Contemporary Economic Policy, Western Economic Association International, vol. 20(4), pages 470-478, October.
  11. You, Liangzhi & Rosegrant, Mark W. & Fang, Cheng & Wood, Stanley, 2005. "Impact of global warming on Chinese wheat productivity:," EPTD discussion papers 143, International Food Policy Research Institute (IFPRI).
  12. Fan, Shenggen & Hazell, P. B. R., 1999. "Are returns to public investment lower in less-favored rural areas?: an empirical analysis of India," EPTD discussion papers 43, International Food Policy Research Institute (IFPRI).
  13. Shorrocks, A F, 1980. "The Class of Additively Decomposable Inequality Measures," Econometrica, Econometric Society, vol. 48(3), pages 613-25, April.
  14. Cabrer-Borras, Bernardi & Serrano-Domingo, Guadalupe, 2007. "Innovation and R&D spillover effects in Spanish regions: A spatial approach," Research Policy, Elsevier, vol. 36(9), pages 1357-1371, November.
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