Valuing Public Goods: Discrete versus Continuous Contingent-Valuation Responses
比较了离散选择与连续支付意愿两种条件价值评估方法在评估公共物品价值时的差异，为环境政策制定者选择合适方法提供参考。
Kevin J. Boyle, F. Reed Johnson, Daniel W. McCollum, William H. Desvousges, Richard W. Dunford, Sara P. Hudson, Valuing Public Goods: Discrete versus Continuous Contingent-Valuation Responses, Land Economics, Vol. 72, No. 3 (Aug., 1996), pp. 381-396