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Robust Benefit Function Transfer: A Bayesian Model Averaging Approach

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  • Roberto Leon-Gonzalez

    ()

  • Riccardo Scarpa

Abstract

A Benefit Function Transfer obtains estimates of Willingness-to-Pay (WTP) for the evaluation of a given policy at a site by combining existing information from different study sites. This has the advantage that more efficient estimates are obtained, but it relies on the assumption that the heterogeneity between sites is appropriately captured in the Benefit Transfer model. A more expensive alternative to estimate WTP is to analyse only data from the policy site in question while ignoring information from other sites. We make use of the fact that these two choices can be viewed as a model selection problem and extend the set of models to allow for the hypothesis that the benefit function is only applicable to a subset of sites. We show how Bayesian Model Averaging (BMA) techniques can be used to optimally combine information from all models. The Bayesian algorithm searches for the set of sites that can form the basis for estimating a Benefit function and reveals whether such information can be transferred to new sites for which only a small dataset is available. We illustrate the method with a sample of 42 forests from U.K. and Ireland. We find that BMA benefit function transfer produces reliable estimates and can increase about 8 times the information content of a small sample when the forest is ‘poolable’.

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Bibliographic Info

Paper provided by Department of Economics, University of Leicester in its series Discussion Papers in Economics with number 07/01.

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Date of creation: Jan 2007
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Handle: RePEc:lec:leecon:07/1

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Related research

Keywords: Benefit Transfer; Bayesian Model Averaging; Exchangeability; Non-market Valuation; Panel Data;

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  1. Arana, Jorge E. & Leon, Carmelo J., 2005. "Flexible mixture distribution modeling of dichotomous choice contingent valuation with heterogenity," Journal of Environmental Economics and Management, Elsevier, vol. 50(1), pages 170-188, July.
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Cited by:
  1. Matthews, D.I. & Hutchinson, W.G. & Scarpa, R., 2009. "Testing the stability of the benefit transfer function for discrete choice contingent valuation data," Journal of Forest Economics, Elsevier, vol. 15(1-2), pages 131-146, January.

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