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The dynamics of an animal - vegetation system: Sheep farming

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  • José-María Da Rocha and Anders Skonhoft

    () (Department of Economics, Norwegian University of Science and Technology and Universitat Autònoma de Barcelona and RGEA-Universidade deVigo)

Abstract

The paper studies the economy and ecology of sheep farming at the farm level in a Nordic context, with a crucial distinction between the outdoors grazing season and the winter indoors feeding season, and where climate conditions fix the length of the grazing season. Two different categories of animals, ewes (adult females) and lambs, and one plant species are included in our ecological model. The farmer is assumed to maximize present-value profit where the revenue is made up income from meat and wool production, and we find that livestock cycles may represent an optimal management policy. We also show that, in a possible steady state with a constant number of animals and constant vegetation quantity, slaughtering either only lambs or only ewes is optimal.

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File URL: http://www.svt.ntnu.no/iso/WP/2012/13_sheepdynamic_AS.pdf
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Bibliographic Info

Paper provided by Department of Economics, Norwegian University of Science and Technology in its series Working Paper Series with number 13612.

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Length: 32 pages
Date of creation: 28 Sep 2012
Date of revision:
Handle: RePEc:nst:samfok:13612

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Keywords: sheep farming; vegetation growth; dynamics;

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  1. Rosen, Sherwin & Murphy, Kevin M & Scheinkman, Jose A, 1994. "Cattle Cycles," Journal of Political Economy, University of Chicago Press, vol. 102(3), pages 468-92, June.
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