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Functional Forms, Exogenous Shifts, and Economic Surplus Changes

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  • Xueyan Zhao
  • John D. Mullen
  • Gary R. Griffith

Abstract

Conditions for exact welfare measures in equilibrium displacement modeling are examined. These relate to the functional form of supply and demand, the nature of the exogenous shift, and the definition of percentage changes. Approximation errors when these conditions are not met in empirical applications are investigated and analytical expressions for the errors derived. Significant errors are possible when a proportional shift is assumed. The assumptions underlying Alston and Wohlgenant's empirical findings are identified. The restriction that supply must be elastic is shown to be unnecessary. Copyright 1997, Oxford University Press.

Suggested Citation

  • Xueyan Zhao & John D. Mullen & Gary R. Griffith, 1997. "Functional Forms, Exogenous Shifts, and Economic Surplus Changes," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 79(4), pages 1243-1251.
    • Handle: RePEc:oup:ajagec:v:79:y:1997:i:4:p:1243-1251
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    File URL: http://hdl.handle.net/10.2307/1244281
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    Citations

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    Cited by:

    1. Willard C. Losinger, 2006. "Evaluating the uncertainty in estimates of the economic impacts of Bovine‐Leukosis virus in U.S. dairy cows," Agricultural Economics, International Association of Agricultural Economists, vol. 35(3), pages 363-372, November.
    2. Saunders, Caroline M. & Cagatay, Selim, 2003. "Commercial release of first-generation genetically modified food products in New Zealand: using a partial equilibrium trade model to assess the impact on producer returns in New Zealand," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 47(2), pages 1-27, June.
    3. X. Zhao & J.D. Mullen & G.R. Griffith & R.R. Piggott & W.E. Griffiths, 2002. "The Economic Incidence of R&D and Promotion Investments in the Australian Beef Industry," Monash Econometrics and Business Statistics Working Papers 16/02, Monash University, Department of Econometrics and Business Statistics.
    4. Dent, Siobahn K. & Piggott, Roley R. & O'Donnell, Christopher J. & Griffith, Garry R., 2003. "Does Excluding Cross-commodity Interactions Matter? Beef and Lamb in Australia," 2003 Conference (47th), February 12-14, 2003, Fremantle, Australia 57859, Australian Agricultural and Resource Economics Society.
    5. Pierre R. Mérel, 2008. "On the Deadweight Cost of Production Requirements for Geographically Differentiated Agricultural Products," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 91(3), pages 642-655.
    6. Zhao, Xueyan & Anderson, Kym & Wittwer, Glyn, 2002. "Who Gains from Australian Generic Wine R&D and Promotion?," 2002 Conference (46th), February 13-15, 2002, Canberra, Australia 125627, Australian Agricultural and Resource Economics Society.
    7. Zhao, Xueyan & Mullen, John D. & Griffith, Garry R., 2001. "Some Practical Issues in Economic Surplus Measurement in Multi-Market Models," 2001 Conference (45th), January 23-25, 2001, Adelaide, Australia 126067, Australian Agricultural and Resource Economics Society.
    8. Zhao, Xueyan & Griffith, Garry R. & Mullen, John D., 2000. "Returns to New Technologies in the Australian Beef Industry: On-farm Research versus Off-farm Research," 2000 Conference (44th), January 23-25, 2000, Sydney, Australia 123749, Australian Agricultural and Resource Economics Society.
    9. Zhao, Xueyan & Mullen, John D. & Griffith, Garry R., 2005. "Economic Surplus Measurement in Multi-Market Models," Working Papers 12910, University of New England, School of Economics.
    10. Zhao, Xueyan & Mullen, John D. & Griffith, Garry R. & Griffiths, William E. & Piggott, Roley R., 2000. "An Equilibrium Displacement Model of the Australian Beef Industry," Research Reports 28007, New South Wales Department of Primary Industries Research Economists.
    11. Mounter, Stuart W. & Griffith, Garry R. & Piggott, Roley R. & Fleming, Euan M. & Zhao, Xueyan, 2008. "An Equilibrium Displacement Model of the Australian Sheep and Wool Industries," Research Reports 37663, New South Wales Department of Primary Industries Research Economists.
    12. Demont, Matty & Tollens, Eric, 2001. "Uncertainties Of Estimating The Welfare Effects Of Agricultural Biotechnology In The European Union," Working Papers 31828, Katholieke Universiteit Leuven, Centre for Agricultural and Food Economics.
    13. Zhao, Xueyan & Griffiths, William E. & Griffith, Garry R. & Mullen, John D., 2000. "Probability distributions for economic surplus changes: the case of technical change in the Australian wool industry," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 44(1), pages 1-24.
    14. Eivind Hestvik Brækkan & Øystein Myrland, 2021. "“All along the curves”: Bridging the gap between comparative statics and simultaneous econometric models," Empirical Economics, Springer, vol. 60(3), pages 1559-1573, March.
    15. Caroline Saunders & Selim Cagatay, 2003. "Commercial release of first‐generation genetically modified food products in New Zealand: using a partial equilibrium trade model to assess the impact on producer returns in New Zealand," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 47(2), pages 233-259, June.

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