The Welfare Impacts of Commodity Price Volatility: Reply
回应McBride的评论，澄清了按平均收入计算的支付意愿比例与平均支付意愿比例的区别，并讨论了使用观测数据的研究局限及可能的解决方案。
It was with delight that we read McBride's comment on our work (Bellemare, Barrett, and Just 2013), first because we welcome more light on a topic on which we spent almost seven years before the AJAE accepted it for publication, and second because a dialogue such as this one is, in our view, part and parcel of what makes the research endeavor worthwhile. In this response to McBride's comment, we bring further light to this topic by discussing the difference between willingness to pay (WTP) as a proportion of income calculated at mean income versus mean WTP as a proportion of income. We then discuss the necessary limitations imposed on researchers doing work of the nature of that done in Bellemare, Barrett, and Just (2013) by the use of observational data. We conclude by briefly discussing potential solutions to those limitations.