IDEAS home Printed from
   My bibliography  Save this paper

Evaluating the impact of agricultural projection modeling using the "IMPACT” framework


  • Ryan, James G.


The International Food Policy Research Institute (IFPRI) has been engaged in food demand and supply projections since its inception in 1975. The early work was primarily focused on assembling historical data from which trends were extrapolated under varying assumptions about future influences on them. Expert opinion was used for this. In the early 1990s, IFPRI developed a global partial equilibrium trade model to base its projections on a stronger behavioral foundation. This enabled various policy scenarios to be explicitly modeled to assess their consequences on food prices, productivity, production, demand, trade, and food and nutrition security. This model was referred to as the International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT). This paper attempts to assess the worth of the research that has gone into the IMPACT framework. It is the ninth in a series of studies commissioned by IFPRI to evaluate the impact of its research and related activities. It is part of a process aimed at improving the effectiveness of IFPRI's work and documenting for donors the wisdom of investing in it. The paper will first describe the IMPACT framework, including the model and the 10 major issues it has been employed to address. This is followed by documentation of various tangible indicators of the outcomes derived from the various outputs and their influence on researchers and policymakers. This includes the extent of citations of IMPACT publications in the literature, demand for copies of the publications, media response, and derived demands for additional research. A discussion of users' perceptions of the IMPACT information's value and impact to users and their institutions follows. This is based upon a mail survey. A concluding section follows.

Suggested Citation

  • Ryan, James G., 2003. "Evaluating the impact of agricultural projection modeling using the "IMPACT” framework," Impact assessments 17, International Food Policy Research Institute (IFPRI).
  • Handle: RePEc:fpr:impass:17

    Download full text from publisher

    File URL:
    Download Restriction: no

    References listed on IDEAS

    1. Alston, Julian M. & Wyatt, T. J. & Pardey, Philip G. & Marra, Michele C. & Chan-Kang, Connie, 2000. "A meta-analysis of rates of return to agricultural R & D: ex pede Herculem?," Research reports 113, International Food Policy Research Institute (IFPRI).
    2. Kilpatrick, Henry E., Jr., 1998. "Some useful methods for measuring the benefits of social science research:," Impact assessments 5, International Food Policy Research Institute (IFPRI).
    3. Rosegrant, Mark W. & Ringler, Claudia, 1999. "Impact on food security and rural development of reallocating water from agriculture:," EPTD discussion papers 47, International Food Policy Research Institute (IFPRI).
    4. Fan, Shenggen & Agcaoili-Sombilla, Mercedita C., 1997. "Why projections on China's future food supply and demand differ," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 41(2), June.
    5. San, Nu Nu & Rosegrant, Mark W. & Perez, Nicostrato D., 1998. "Indonesian agriculture in transition: Projections of alternative futures," Journal of Asian Economics, Elsevier, vol. 9(3), pages 445-465.
    6. Pardey, Philip G. & Christian, Jason E., 2002. "The production and diffusion of policy knowledge," Impact assessments 14, International Food Policy Research Institute (IFPRI).
    7. Pardey, Philip G. & Beintema, Nienke M., 2002. "Slow Magic: Agricultural R&D A Century After Mendel," Working Papers 14364, University of Minnesota, Center for International Food and Agricultural Policy.
    8. Agcaoili-Sombilla, Mercedita & Rosegrant, Mark W., 1996. "South Asia and the global food situation: Challenges for strengthening food security," Journal of Asian Economics, Elsevier, vol. 7(2), pages 265-292.
    9. Rosegrant, Mark W. & Hazell, Peter B. R., 2001. "Transforming the rural Asian economy," 2020 vision briefs 69, International Food Policy Research Institute (IFPRI).
    10. Ryan, Jim, 2002. "Assessing the impact of food policy research: rice trade policies in Viet Nam," Food Policy, Elsevier, vol. 27(1), pages 1-29, February.
    Full references (including those not matched with items on IDEAS)


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

    Cited by:

    1. Kuyvenhoven, Arie, 2014. "Impact assessment of IFPRI’s capacity-strengthening work, 1985–2010," Impact assessments 38, International Food Policy Research Institute (IFPRI).
    2. Paarlberg, Robert L., 2014. "Impact assessment: IFPRI 2020 conference on building resilience on food and nutrition security," Impact assessments 37, International Food Policy Research Institute (IFPRI).
    3. Falck-Zepeda, Jose Benjamin & Msangi, Siwa & Sulser, Timothy B. & Zambrano, Patricia, 2008. "Biofuels and Rural Economic Development in Latin America and the Caribbean," 2008 Annual Meeting, July 27-29, 2008, Orlando, Florida 6113, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).

    More about this item


    Food supply Forecasting ; Food security Forecasting ; Equilibrium (Economics) Models ; Food prices ; productivity ; Research institutes Evaluation ;

    NEP fields

    This paper has been announced in the following NEP Reports:


    Access and download statistics


    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:fpr:impass:17. 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: (). General contact details of provider: .

    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.

    If CitEc recognized a reference but did not link an item in RePEc to it, you can help with 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.