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The importance of product cut and form when estimating fish demand: the case of U.S. Catfish

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  • Andrew Muhammad

    (Department of Agricultural Economics, Mississippi State University, Mississippi State, MS 39762)

  • Terrill R. Hanson

    (Department of Fisheries and Allied Aquacultures, Auburn University, 203 Swingle Hall, Auburn, AL 36849)

Abstract

The absolute price version of the Rotterdam model was used in the estimation of U.S. catfish demand where catfish was differentiated by product cut (whole, fillet, and other) and product form (fresh and frozen). Likelihood ratio tests were used to determine the importance of product form in demand (product form aggregation). Likelihood ratio tests were also used to determine if fresh products were separable from frozen products (product form separability). Product form aggregation was rejected at a probability of 0.999, suggesting that fresh and frozen catfish products are not homogenous. The hypothesis, no product form separability, failed to be rejected at the 0.05 significance level, but was rejected at the 0.01 significance level. Test results suggest that it is more acceptable to focus on a single product group (e.g., frozen products) than to assume that catfish products are perfectly aggregatable across product forms. [JEL classifications: Q11, Q13, Q22]. © 2009 Wiley Periodicals, Inc.

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File URL: http://hdl.handle.net/10.1002/agr.20191
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Bibliographic Info

Article provided by John Wiley & Sons, Ltd. in its journal Agribusiness.

Volume (Year): 25 (2009)
Issue (Month): 4 ()
Pages: 480-499

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Handle: RePEc:wly:agribz:v:25:y:2009:i:4:p:480-499

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Web page: http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1520-6297

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  1. Italianer, Alexander, 1985. "A small-sample correction for the likelihood ratio test," Economics Letters, Elsevier, vol. 19(4), pages 315-317.
  2. Barten, A. P. & Bettendorf, L. J., 1989. "Price formation of fish : An application of an inverse demand system," European Economic Review, Elsevier, vol. 33(8), pages 1509-1525, October.
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  7. Eales, James S. & Roheim, Cathy A., 1999. "Testing Separability Of Japanese Demand For Meat And Fish Within Differential Demand Systems," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 24(01), July.
  8. Seale, James L., Jr. & Sparks, Amy L. & Buxton, Boyd M., 1992. "A Rotterdam Application To International Trade In Fresh Apples: A Differential Approach," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 17(01), July.
  9. Clements, Kenneth W & Selvanathan, Antony & Selvanathan, Saroja, 1996. "Applied Demand Analysis: A Survey," The Economic Record, The Economic Society of Australia, vol. 72(216), pages 63-81, March.
  10. Chiang, Fu-Sung & Lee, Jonq-Ying & Brown, Mark G., 2001. "The Impact Of Inventory On Tuna Price: An Application Of Scaling In The Rotterdam Inverse Demand System," Journal of Agricultural and Applied Economics, Southern Agricultural Economics Association, vol. 33(03), December.
  11. Ligeon, Carel & Jolly, Curtis M. & Jackson, John D., 1996. "Evaluation Of The Possible Threat Of Nafta On U.S. Catfish Industry Using A Traditional Import Demand Function," Journal of Food Distribution Research, Food Distribution Research Society, vol. 27(2), July.
  12. Moschini, GianCarlo & Moro, D. & Green, Richard D., 1994. "Maintaining and Testing Separability in Demand Systems," Staff General Research Papers 11247, Iowa State University, Department of Economics.
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