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Infectious Disease, Productivity, And Scale In Open And Closed Animal Production Systems

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  • Hennessy, David A.
  • Roosen, Jutta
  • Jensen, Helen H.

Abstract

Comparative advantage motivates large trade flows in feeder animals throughout the world. Trade creates externalities when animal diseases can spread beyond the purchasing farm. When growers can choose between open and closed production systems, Nash equilibrium will likely involve socially excessive trading. Supply response to an increase in marginal costs may be positive. While first-best involves marketwide adoption of either an open-trade or closed-farm system, equilibrium may entail heterogeneous systems. If this is the case, then the feeder trade should be banned. Within a farm, we show how risk of infectious disease can create decreasing returns to scale when the technology is otherwise increasing in returns to scale. Control of disease risk through bilateral contracts or damage-control technologies will increase scale of production in fattening, while better sorting in feeder animal markets will have ambiguous effects on scale.

Suggested Citation

  • Hennessy, David A. & Roosen, Jutta & Jensen, Helen H., 2004. "Infectious Disease, Productivity, And Scale In Open And Closed Animal Production Systems," Hebrew University of Jerusalem Archive 18405, Hebrew University of Jerusalem.
    • Handle: RePEc:ags:hebarc:18405
    DOI: 10.22004/ag.econ.18405
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    Keywords

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    JEL classification:

    • D62 - Microeconomics - - Welfare Economics - - - Externalities
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies
    • L22 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - Firm Organization and Market Structure

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