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The Effects Of Research On Wheat Yields And Yield Variances

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  • He, Senhui
  • White, Fred C.
  • Fletcher, Stanley M.

Abstract

This paper investigates the impacts of research investment on wheat production. A two-way error component random effect model was estimated using panel data to examine the effects of research investment on mean yield and yield variance. Results show that, for the time period between 1974 and 1995, research investment enhanced yield stability but had no significant impact on mean yield. Key words: yield, yield variance, research investment.

Suggested Citation

  • He, Senhui & White, Fred C. & Fletcher, Stanley M., 2003. "The Effects Of Research On Wheat Yields And Yield Variances," 2003 Annual Meeting, February 1-5, 2003, Mobile, Alabama 35155, Southern Agricultural Economics Association.
    • Handle: RePEc:ags:saeatm:35155
    DOI: 10.22004/ag.econ.35155
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    References listed on IDEAS

    as
    1. Harvey, A C, 1976. "Estimating Regression Models with Multiplicative Heteroscedasticity," Econometrica, Econometric Society, vol. 44(3), pages 461-465, May.
    2. Richard E. Just & Rulon D. Pope, 1979. "Production Function Estimation and Related Risk Considerations," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 61(2), pages 276-284.
    3. A. J. Singh & D. Byerlee, 1990. "Relative Variability In Wheat Yields Across Countries And Over Time," Journal of Agricultural Economics, Wiley Blackwell, vol. 41(1), pages 21-32, January.
    4. Mehra, Shakuntla, 1981. "Instability in Indian agriculture in the context of the new technology:," Research reports 25, International Food Policy Research Institute (IFPRI).
    5. Just, Richard E. & Pope, Rulon D., 1978. "Stochastic specification of production functions and economic implications," Journal of Econometrics, Elsevier, vol. 7(1), pages 67-86, February.
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