成果｜林雯合作论文在European Review of Agricultural Economics在线发表

近日，浙江大学中国农村发展研究院林雯研究员和密歇根州立大学农业、食品与资源经济系David Ortega和Vincenzina Caputo副教授合作撰写的学术论文“Experimental Quantity, Mental Budgeting and Food Choice: A Discrete Choice Experiment Application”于2022年8月在European Review of Agricultural Economics在线发表。European Review of Agricultural Economics是农业经济学领域的国际知名期刊，影响因子为4.5。

◇ 中文摘要：

尽管离散选择实验已被广泛应用于农业与食品经济学研究中，但是在利用离散选择实验对农产品和/或食品进行非市场估值时，以往研究对实验产品的数量关注不足，这主要表现在研究人员一般采用预先确定的、任意的实验产品数量设计产品选项。本研究结果表明，由于心理账户的存在，使用研究人员预先确定的实验产品数量将导致消费者货币的边际效用以及福利估计出现偏误。具体而言，当使用预先确定的相对较小的实验数量设计时，消费者较低的货币边际效用将导致其高估产品的支付意愿。这一行为偏误在高收入消费者更为明显。基于本研究的结论，我们建议将选择实验中的产品数量与消费者实际购买数量相匹配，以克服使用预先确定的、任意的实验数量设计可能产生的影响。

◇ 英文摘要：

Food discrete choice experiments typically define product alternatives with a researcher-predetermined and sometimes arbitrary quantity. Results reveal that the use of a researcher-prespecified experimental quantity leads to biased welfare estimates. Differences in marginal utility of money are found with a resulting upward bias in willingness to pay estimates when small pre-defined product quantities are used. Higher-income consumers show more evident bias. This evidence cautions the use of a researcher-predetermined quantity to design alternatives in choice tasks and also proposes an alternative experimental design that accounts for these effects by matching the quantity in experiments to consumer’s actual purchase quantity.

◇ 全文链接：

Lin Wen, David Ortega* and Vincenzina Caputo. 2022. “Experimental Quantity, Mental Budgeting and Food Choice: A Discrete Choice Experiment Application.”

European Review of Agricultural Economics,

https://doi.org/10.1093/erae/jbac017