用水者规模、群体异质性与小型农田水利设施自主治理绩效

The Number of Water Users, Group Heterogeneity and Self-governance Performance of Small Hydraulic Facilities

本文以内蒙古、陕西、宁夏、河南、山东5个省份100个位于黄河灌区的村庄为例,通过建立门槛回归模型,实证分析了用水者规模、用水者群体异质性与小型农田水利设施自主治理绩效之间的关系。结果表明,用水者规模存在显著而稳健的"门槛效应",当用水者规模达到一定程度时,用水者的经济、社会以及其它维度异质性对小型农田水利设施自主治理绩效的影响均会发生不同程度的改变。总体来看,用水者规模的门槛值介于300~348户之间,经济异质性和社会文化异质性原本对小型农田水利设施自主治理绩效的负向影响在用水者规模超越门槛值后分别减小了72.36%和71.64%。

Based on data collected from 100 villages from Shaanxi, Henan, Shandong provinces and Ningxia, Inner Mongolia autonomous regions, this article explores the interrelationsamong the number of water users, group heterogeneity and self-govemance performance of small hydraulic facilities. By using a threshold regression model, the study finds that the number of water users has a significant and robust threshold effect. The influence of group heterogeneity on the self-governance performance of small hydraulic facilities becomes different when the number of water users exceeds the threshold value. On the whole, the threshold value concerning the number of water users is between 300 and 348 households. The negative effects of economic heterogeneity and social-cultural heterogeneity on self-govemance performance are found to decrease by 72.36% and 71.64% when the number of water users exceeds the threshold value.