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LL601 Contamination and Its Impact on U.S. Rice Prices


  • Li, Yarui
  • Wailes, Eric J.
  • McKenzie, Andrew M.
  • Thomsen, Michael R.


LL601 is a genetically modified rice variety and unapproved for commercial use. Its presence was found in commercial shipments of U.S. rice in 2006. This article explores its impact on prices and volume marketed for both the United States and Thailand, the major export competitor. The results show a significantly adverse but short duration effect on the U.S. rice market and little to no effect on the Thai rice market.

Suggested Citation

  • Li, Yarui & Wailes, Eric J. & McKenzie, Andrew M. & Thomsen, Michael R., 2010. "LL601 Contamination and Its Impact on U.S. Rice Prices," Journal of Agricultural and Applied Economics, Southern Agricultural Economics Association, vol. 42(01), February.
  • Handle: RePEc:ags:joaaec:57154

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    Cited by:

    1. Mulvaney, Dustin & Krupnik, Timothy J., 2014. "Zero-tolerance for genetic pollution: Rice farming, pharm rice, and the risks of coexistence in California," Food Policy, Elsevier, vol. 45(C), pages 125-131.
    2. Kalaitzandonakes, Nicholas & Kaufman, James & Miller, Douglas, 2014. "Potential economic impacts of zero thresholds for unapproved GMOs: The EU case," Food Policy, Elsevier, vol. 45(C), pages 146-157.
    3. de Faria, Rosane Nunes & Wieck, Christine, 2014. "Measuring The Extent Of Gmo Asynchronous Approval Using Regulatory Dissimilarity Indices: The Case Of Maize And Soybean," 2014 International Congress, August 26-29, 2014, Ljubljana, Slovenia 182796, European Association of Agricultural Economists.
    4. Smyth, Stuart & Kerr, William A. & Phillips, Peter, 2010. "The Incompatibility of Science and Trade at the International Level," 14th ICABR Conference, June 16-18, 2010, Ravello, Italy 188113, International Consortium on Applied Bioeconomy Research (ICABR).
    5. de Faria, Rosane Nunes & Wieck, Christine, 2015. "Empirical evidence on the trade impact of asynchronous regulatory approval of new GMO events," Food Policy, Elsevier, vol. 53(C), pages 22-32.

    More about this item


    cointegration; error correction model; event study analysis; GM contamination; LibertyLink Rice 601; U.S. rice exports; Agribusiness; Agricultural and Food Policy; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; International Relations/Trade; Research and Development/Tech Change/Emerging Technologies; C10; C32; Q11; A52;

    JEL classification:

    • C10 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - General
    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • Q11 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Aggregate Supply and Demand Analysis; Prices


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