1. Impure Altruism and Donations to Public Goods: A Theory of Warm-Glow Giving;Andreoni;The Economic Journal,1990
2. Bennett, R. M. (1994). Theoretical and Practical Considerations for the Valuation of Farm Animal Welfare, in Bennett, R. M. (ed) Valuing Farm Animal Welfare. Proceedings of a Workshop held at The University of Reading, September 1993. Occasional Paper No. 3, Department of Agricultural Economics and Management, University of Reading, UK.
3. The Value of Farm Animal Welfare;Bennett;Journal of Agricultural Economics,1995
4. Measuring Values of Extramarket Goods: Are Indirect Measures Biased;Bishop;American Journal of Agricultural Economics,1979