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Modeling Joint Dependence of Managed Ecosystems Pests: The Case of the Wheat Stem Sawfly

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  • Bekkerman, Anton
  • Weaver, David K.

Abstract

Many invasive and opportunistic pests cause multiple, interdependent adverse outcomes on agricultural production. Often, however, these impacts are modeled independently, which can bias empirical inferences and contribute to inaccurate recommendations. We use a copula function to more accurately model the joint behavior and provide an empirical example of its application to assess the impacts of the wheat stem sawfly (WSS). We use a unique farm-level dataset to estimate the expected losses associated with WSS and then evaluate two popular WSS management strategies. We find that strategies minimizing long-run infestation levels are preferred to those that seek to maximize yield potential in exchange for higher risk of intertemporal infestation.

Suggested Citation

  • Bekkerman, Anton & Weaver, David K., 2018. "Modeling Joint Dependence of Managed Ecosystems Pests: The Case of the Wheat Stem Sawfly," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 43(2), May.
    • Handle: RePEc:ags:jlaare:273445
    DOI: 10.22004/ag.econ.273445
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    References listed on IDEAS

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    1. Wallace, L. E. & McNeal, F.H., 1966. "Stem Sawflies of Economic Importance in Grain Crops in the United States," Technical Bulletins 171355, United States Department of Agriculture, Economic Research Service.
    2. Sunding, David & Zilberman, David, 2001. "The agricultural innovation process: Research and technology adoption in a changing agricultural sector," Handbook of Agricultural Economics, in: B. L. Gardner & G. C. Rausser (ed.), Handbook of Agricultural Economics, edition 1, volume 1, chapter 4, pages 207-261, Elsevier.
    3. Patton, Andrew J., 2012. "A review of copula models for economic time series," Journal of Multivariate Analysis, Elsevier, vol. 110(C), pages 4-18.
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    1. Subodh Adhikari & Arjun Adhikari & David K. Weaver & Anton Bekkerman & Fabian D. Menalled, 2019. "Impacts of Agricultural Management Systems on Biodiversity and Ecosystem Services in Highly Simplified Dryland Landscapes," Sustainability, MDPI, vol. 11(11), pages 1-16, June.

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