收储制度改革能否促进玉米生产率增长?——来自全国农村固定观察点的经验证据  

Can the Reform of Corn Purchase and Storage Policy Promote the Growth of Corn productivity——Empirical Evidence from Fixed Observation Points Across Rural China

作　　者：叶锋 童婷 李谷成 YE Feng;TONG Ting;LI Gucheng

机构地区：[1]华中农业大学经济管理学院/农业经济研究所,湖北武汉430070

出　　处：《华中农业大学学报（社会科学版）》2023年第6期83-95,共13页Journal of Huazhong Agricultural University(Social Sciences Edition)

基　　金：国家社会科学基金重大项目“新形势下我国农业全要素生产率提升战略研究”(18ZDA072);国家自然科学基金项目“中国农业全要素生产率增长的微观基础及若干农业政策的生产率效应评估”(71873050)。

摘　　要：玉米收储制度改革是我国粮食价格支持政策市场化改革的重要举措,评估其生产率效应对玉米产业高质量发展具有重要意义。利用2014-2019年全国农村固定观察点的大样本农户数据,采用倾向得分匹配-双重差分模型研究了收储制度改革对农户玉米生产率的影响。结果表明:收储制度改革对农户玉米生产率的平均提升效应为8.7%,在进行替换变量、更换样本、改变方法、安慰剂检验以及排除干扰政策等一系列稳健性检验后结果仍然显著;收储制度改革分为取消临储价格和实施生产者补贴两个阶段,实施生产者补贴对玉米生产率的提升大于取消临储价格;异质性分析结果表明,对于规模越大、专业化水平越高、兼业程度越高、玉米生产率越低的农户而言,收储制度改革的生产率提升效应更为明显;收储制度改革会通过优化土地资源配置、增加生产性投资提高农户玉米生产率。The reform of corn purchase and storage policy is an important measure to support the market-oriented reform of grain price and assessing its effect on productivity is of great significance for the high-quality development of the corn industry.This paper studies the impact of the reform of corn purchase and storage policy on farmers’corn productivity by adopting the Propensity Score Matching and Difference-in-Difference Model(PSM-DID)using the data of a large sample of farmers from fixed observation points across rural China during 2014-2019.The results are as follow.Firstly,the average effect of the reform of corn purchase and storage policy on the farmer’s corn productivity is 8.7%,and the results are still significant after a series of robustness tests such as substitution variables,change of samples,change of methods,placebo test and disturbance elimination policy.Secondly,the reform is divided into two stages:the cancellation of the temporary storage price and the implementation of producer subsidies.the implementation of producer subsidies has a greater positive impact on the productivity of corn than the cancellation of the temporary storage price.Thirdly,the results of heterogeneity analysis show that the positive effect is more pronounced for the reform of the farmer households with larger scale,higher level of specialization,higher degree of diversified work and lower corn productivity.Fourthly,the reform will increase the corn productivity of the farmer households by optimizing land resource allocation and increasing productive investment.

关 键 词：收储制度改革 玉米 生产率 PSM-DID模型 

分 类 号：F32[经济管理—产业经济]