本文从农民兼业与施药不同步的角度解释了粮食作物农药施用强度的增长.基于农村固定观察点数据运用固定效应回归模型对农民兼业与农药施用之间关系进行实证分析.研究结果表明,自家农业劳动力本地非农兼业对农户农药施用强度的影响不显著;外地兼业会显著减少水稻的亩均农药施用量,但对小麦和玉米的影响不显著.然而,区域内其他户农业劳动力的兼业比例提升会显著增加本户在小麦、玉米、水稻生产中的亩均农药施用量.这暗示兼业所导致的区域性施药不同步会产生负的外部影响.This article provided an explanation for the increase of pesticide use: farmers’ part-time jobs led to the failure of collective prevention. Based on the Fixed Point Rural Survey (FPRS) data, Ministry of Agriculture (MOA) and with the fixed effect regression model used, an empirical analysis on the relationship between part-time jobs and pesticide input. The results showed that there was no significant impact on their own pesticide input in wheat and corn if farmers took part-time jobs in local and non-local areas, while taking part-time jobs in non-local areas decreased their own pesticide input for rice. However, the participation in part-time jobs on the part of other farmers in a region increased this former’s pesticideinput for the three crops. This implied that the negative impact externality might be caused by participation in part-time jobs due to the failure of take part in collective prevention of pest
