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Economics of spatial coexistence of genetically modified and conventional crops: Oilseed rape in Central France

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  • Demont, Matty
  • Daems, W.
  • Dillen, Koen
  • Mathijs, Erik
  • Sausse, C.
  • Tollens, Eric

Abstract

Europe is currently struggling to implement coherent coexistence regulations on genetically modified (GM) and non-GM crops in all EU Member States. We conduct simulations with the software ArcView® on a GIS dataset of a hypothetical case of GM herbicide tolerant oilseed rape cultivation in Central France. Our findings show that rigid coexistence rules, such as large distance requirements, may impose a severe burden on GM crop production in Europe. These rules are not proportional to the farmers’ basic incentives for coexistence and hence not consistent with the objectives of the European Commission. More alarming, we show that in densely planted areas a domino-effect may occur. This effect raises coexistence costs and even adds to the non-proportionality of rigid coexistence regulations. Instead, we show that flexible measures would be preferable since they are proportional to the incentives for coexistence and, hence, less counterproductive for European agriculture.

Suggested Citation

  • Demont, Matty & Daems, W. & Dillen, Koen & Mathijs, Erik & Sausse, C. & Tollens, Eric, 2008. "Economics of spatial coexistence of genetically modified and conventional crops: Oilseed rape in Central France," 2008 International Congress, August 26-29, 2008, Ghent, Belgium 43650, European Association of Agricultural Economists.
    • Handle: RePEc:ags:eaae08:43650
    DOI: 10.22004/ag.econ.43650
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    References listed on IDEAS

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    1. Bullock, D. S. & Desquilbet, M., 2002. "The economics of non-GMO segregation and identity preservation," Food Policy, Elsevier, vol. 27(1), pages 81-99, February.
    2. Volker Beckmann & Justus Wesseler, 2007. "Spatial Dimension of Externalities and the Coase Theorem: Implications for Co-existence of Transgenic Crops," Springer Books, in: Wim Heijman (ed.), Regional Externalities, chapter 11, pages 223-242, Springer.
    3. D.S. Bullock & Marion Desquilbet, 2002. "The economics of non-GMO segregation and identity preservation," Post-Print hal-02364321, HAL.
    4. Belcher, Ken & Nolan, James & Phillips, Peter W.B., 2005. "Genetically modified crops and agricultural landscapes: spatial patterns of contamination," Ecological Economics, Elsevier, vol. 53(3), pages 387-401, May.
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    Cited by:

    1. Jennifer Schweiger & Ali Ferjani & Achim Spiller, 2010. "Agentenbasierte Abschätzung der Wirtschaft-lichkeit von transgenen Kulturen anhand von Beispielbetrieben in einer Schweizer Ackerbau-region," Journal of Socio-Economics in Agriculture (Until 2015: Yearbook of Socioeconomics in Agriculture), Swiss Society for Agricultural Economics and Rural Sociology, vol. 3(1), pages 3-37.
    2. Gray, Emily & Ancev, Tihomir & Drynan, Ross, 2011. "Coexistence of GM and non-GM crops with endogenously determined separation," Ecological Economics, Elsevier, vol. 70(12), pages 2486-2493.

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