IDEAS home Printed from https://ideas.repec.org/p/ags/iaae06/25239.html
   My bibliography  Save this paper

Changes in Yield Stability: Wheat and Maize in Developing Countries

Author

Listed:
  • Gollin, Douglas

Abstract

This study asks whether the diffusion of modern varieties has affected the yield stability of wheat and maize production in developing countries between 1960 and 2004. The data suggest strongly that, over the past forty-plus years, there has been a striking decline in the relative variability of grain yields in wheat and (to a lesser extent) maize. The declines are strongest when measured as the standard deviation of yield divided by the mean, but there have also been declines in other measures of variability, such as the percentage deviation from trend. Declines in yield variability do not appear to be driven by increases in intensification (e.g., irrigation), nor do they appear to extend to crops, such as oilseeds, in which there has been little concerted public sector breeding effort. Instead, they appear to reflect changes in the portfolio of varieties being grown, possibly in response to breeding efforts aimed at disease and pest problems. By reducing the fluctuations in grain yields, researchers may have played a significant role in making modern crop technology attractive and accessible to farmers around the globe.

Suggested Citation

  • Gollin, Douglas, 2006. "Changes in Yield Stability: Wheat and Maize in Developing Countries," 2006 Annual Meeting, August 12-18, 2006, Queensland, Australia 25239, International Association of Agricultural Economists.
  • Handle: RePEc:ags:iaae06:25239
    as

    Download full text from publisher

    File URL: http://purl.umn.edu/25239
    Download Restriction: no

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ivanic, Maros & Martin, Will, 2014. "Implications of domestic price insulation for global food price behavior," Journal of International Money and Finance, Elsevier, vol. 42(C), pages 272-288.

    More about this item

    Keywords

    Crop Production/Industries;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:ags:iaae06:25239. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (AgEcon Search). General contact details of provider: http://edirc.repec.org/data/iaaeeea.html .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.