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The Impact of Negativity on Separability Testing

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  • James Eales
  • Jason R. Henderson

Abstract

During separability testing, it has not been common practice to verify if the data satisfy the negativity condition. The impacts of imposing negativity on separability test results are examined for two groups of commodities using Barten's generalized demand system and with Monte Carlo simulations. Results indicate that imposing negativity did not alter model estimates when negativity was spontaneously satisfied. Also, imposing negativity rarely altered separability test results when the data did not spontaneously satisfy negativity. Copyright 2001, Oxford University Press.

Suggested Citation

  • James Eales & Jason R. Henderson, 2001. "The Impact of Negativity on Separability Testing," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 83(2), pages 465-477.
    • Handle: RePEc:oup:ajagec:v:83:y:2001:i:2:p:465-477
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    File URL: http://hdl.handle.net/10.1111/0002-9092.00170
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    Cited by:

    1. Njonou, Rabelais Yankam & Frahan, Bruno Henry de & Surry, Yves R., 2002. "Testing Separability for Common Wheat Qualities in French Import Demand Market Using Aids and Rotterdam Demand Models," 2002 International Congress, August 28-31, 2002, Zaragoza, Spain 24921, European Association of Agricultural Economists.
    2. Daniel Hassan & Sylvette Monier-Dilhan, 2009. "Mesure des changements de consommation suite à une segmentation de l’offre : l’exemple de la tomate fraîche," Review of Agricultural and Environmental Studies - Revue d'Etudes en Agriculture et Environnement, INRA Department of Economics, vol. 90(3), pages 309-326.
    3. Widenhorn, Andreas & Salhofer, Klaus, 2014. "Using a Generalized Differenced Demand Model to Estimate Price and Expenditure Elasticities for Milk and Meat in Austria," German Journal of Agricultural Economics, Humboldt-Universitaet zu Berlin, Department for Agricultural Economics, vol. 63(02), pages 1-16, June.
    4. Cranfield, J. A. L. & Pellow, Scott, 2004. "The role of global vs. local negativity in functional form selection: an application to Canadian consumer demands," Economic Modelling, Elsevier, vol. 21(2), pages 345-360, March.
    5. Fabian Bergès & Daniel Hassan & Sylvette Monier-Dilhan, 2013. "Are Consumers More Loyal To National Brands Than To Private Labels?," Bulletin of Economic Research, Wiley Blackwell, vol. 65, pages 1-16, May.
    6. Widenhorn, Andreas & Salhofer, Klaus, 2014. "Using a Generalized Differenced Demand Model to Estimate Price and Expenditure Elasticities for Milk and Meat in Austria," Journal of International Agricultural Trade and Development, Journal of International Agricultural Trade and Development, vol. 63(2).
    7. Abdullahi Abdulkadri & Michael Langemeier & Allen Featherstone, 2006. "Estimating economies of scope and scale under price risk and risk aversion," Applied Economics, Taylor & Francis Journals, vol. 38(2), pages 191-201.

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