张晓恒 马旺林 Puneet Vatsa 姜仕杰：短供应链、技术效率和技术进步——来自黄瓜生产的启示

Xiaoheng Zhang，Wanglin Ma, Puneet Vatsa and Shijie Jiang (2022). "Short supply chain, technical efficiency, and technological change: Insights from cucumber production." Agribusiness: An International Journal. first online

原文链接：

https://doi.org/10.1002/agr.21789

摘要：

本文利用2011-2016年我国黄瓜生产的数据，考察了农户加入供应短链（short supply chains）对技术效率（technical efficienc）和技术进步（technological change）的影响。我们使用共同前沿生产函数模型来计算参与供应短链和未参与供应短链农户的可比较技术效率和技术差距，并使用两阶段残差法修正选择性偏误问题。结果发现，参与供应短链明显降低了黄瓜生产的技术效率，但促进了技术进步。进一步分析结果显示，供应短链参与者的技术效率小于未参与者，并且未参与者的技术效率呈现逐年增加趋势；短供应链参与者的技术效率呈现波动趋势，在某些年份增加而在其他年份减少。最后，短供应链参与者和未参与者的技术进步都随着时间的推移而增加，但短供应链参与者的技术进步速率更高。

Abstract

This study examines the impact of participation in short supply chains (SSCs) on technical efficiency (TE) and technological change (TC) in cucumber production in China, using data for the period 2011–2016. The meta-frontier model and the two-stage residual inclusion approach are utilized to examine the association between SSC participation, comparable TE, and TC. Accounting for selection bias, we show that SSC participation significantly decreased the comparable TE of cucumber production but accelerated TC. The disaggregated analysis reveals that the comparable TE for SSC participants was generally smaller than that for nonparticipants. Furthermore, comparable TE for nonparticipants consistently increased year-over-year, whereas, for SSC participants, it increased during some years and decreased during others. Last but not least, TC for both SSC participants and nonparticipants increased over time.

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