Online from: 2000
Subject Area: Economics
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|Title:||Stochastic simulation using @Risk for dairy business investment decisions|
|Author(s):||J.M. Bewley, (Department of Animal Sciences, Purdue University, West Lafayette, Indiana, USA), M.D. Boehlje, (Department of Agricultural Economics, Purdue University, West Lafayette, Indiana, USA), A.W. Gray, (Department of Agricultural Economics, Purdue University, West Lafayette, Indiana, USA), H. Hogeveen, (Faculty Veterinary Medicine, Utrecht University, Utrecht, The Netherlands), S.J. Kenyon, (Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, Indiana, USA), S.D. Eicher, (Livestock Behavior Research Unit, Agricultural Research Service, USDA, West Lafayette, Indiana, USA), M.M. Schutz, (Department of Animal Sciences, Purdue University, West Lafayette, Indiana, USA)|
|Citation:||J.M. Bewley, M.D. Boehlje, A.W. Gray, H. Hogeveen, S.J. Kenyon, S.D. Eicher, M.M. Schutz, (2010) "Stochastic simulation using @Risk for dairy business investment decisions", Agricultural Finance Review, Vol. 70 Iss: 1, pp.97 - 125|
|Keywords:||Agriculture, Investment appraisal, Modelling, Net present value, Stochastic processes|
|Article type:||Research paper|
|DOI:||10.1108/00021461011042666 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
|Acknowledgements:||The authors would like to express gratitude to the following individuals for their assistance on methodology for specific parts of this model: Huybert Groenendaal, Nicolas Friggens, Paivi Rajala-Schultz, Patrick French, Gregg Hadley, and Robert Boyce. No copyright is associated with this paper because of the author's employment by the United States Federal Government at the time the paper was written.|
Purpose – The purpose of this paper is to develop a dynamic, stochastic, mechanistic simulation model of a dairy business to evaluate the cost and benefit streams coinciding with technology investments. The model was constructed to embody the biological and economical complexities of a dairy farm system within a partial budgeting framework. A primary objective was to establish a flexible, user-friendly, farm-specific, decision-making tool for dairy producers or their advisers and technology manufacturers.
Design/methodology/approach – The basic deterministic model was created in Microsoft Excel (Microsoft, Seattle, Washington). The @Risk add-in (Palisade Corporation, Ithaca, New York) for Excel was employed to account for the stochastic nature of key variables within a Monte Carlo simulation. Net present value was the primary metric used to assess the economic profitability of investments. The model was composed of a series of modules, which synergistically provide the necessary inputs for profitability analysis. Estimates of biological relationships within the model were obtained from the literature in an attempt to represent an average or typical US dairy. Technology benefits were appraised from the resulting impact on disease incidence, disease impact, and reproductive performance. In this paper, the model structure and methodology were described in detail.
Findings – Examples of the utility of examining the influence of stochastic input and output prices on the costs of culling, days open, and disease were examined. Each of these parameters was highly sensitive to stochastic prices and deterministic inputs.
Originality/value – Decision support tools, such as this one, that are designed to investigate dairy business decisions may benefit dairy producers.
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