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Animals 2017, 7(3), 23; doi:10.3390/ani7030023

The Need for Formal Evidence Synthesis in Food Policy: A Case Study of Willingness-to-Pay

School of Agriculture Food and Rural Development, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
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Academic Editor: Clive J. C. Phillips
Received: 29 November 2016 / Revised: 27 February 2017 / Accepted: 4 March 2017 / Published: 10 March 2017
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Abstract

Meta-analysis is increasingly utilised in the understanding of consumer behaviour, including in relation to farm animal welfare. However, the issue of publication bias has received little attention. As willingness-to-pay (WTP) is widely used in policy, it is important to explore publication bias. This research aimed to evaluate publication bias in WTP, specifically public WTP for farm animal welfare. A systematic review of four databases yielded 54 studies for random effects meta-analysis. Publication bias was assessed by the Egger test, rank test, contour-enhanced funnel plots, and the Vevea and Hedges weight-function model. Results consistently indicated the presence of publication bias, highlighting an overestimation of WTP for farm animal welfare. Stakeholders should be wary of WTP estimates that have not been critically evaluated for publication bias. View Full-Text
Keywords: farm animal welfare; meta-analysis; willingness-to-pay; publication bias farm animal welfare; meta-analysis; willingness-to-pay; publication bias
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MDPI and ACS Style

Clark, B.; Frewer, L.J.; Panzone, L.A.; Stewart, G.B. The Need for Formal Evidence Synthesis in Food Policy: A Case Study of Willingness-to-Pay. Animals 2017, 7, 23.

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