关键词: 农机补贴, 门槛效应, 溢出效应, 农村劳动力转移, 收入分配效应

Abstract: Agricultural machinery subsidy is an efficiency enhancement policy with threshold effect, in which efficiency and fairness can hardly be obtained simultaneously. This paper analyzes the impact of agricultural machinery subsidy on agricultural production and rural labor transfer through theoretical model. Further, it studies the income distribution effect and mechanism by instrumental variable method and mediator method. The results show that agricultural machinery subsidy significantly reduces the Gini coefficient of farmers' income and improves the fairness of income distribution. The mechanism is that agricultural machinery subsidy improves the agricultural production efficiency, promotes the rural labor transfer, and improves the income of migrant workers, especially the relatively poor farmers, thus offsetting the threshold effect and making the income distribution effect of agricultural machinery subsidy both efficient and fair.

Key words: agricultural machinery subsidy, threshold effect, spillover effect, rural labor transfer, income distribution effect