To explore how to alleviate the “climate lock-in” dilemma in China’s agricultural development, this study takes the “Standardized Agricultural Meteorological Services Policy” as a quasi-natural experiment for the strengthening of agricultural meteorological services. Using a set of county-level panel data from 2011 to 2021, this study constructs a multi-period difference-in-differences model. Parallel trend tests, placebo tests, heterogeneous treatment effect tests, and PSM-DID estimation are employed to evaluate the impact of meteorological services on county-level agricultural economic growth. The results show that: Meteorological services have significantly promoted agricultural economic growth; The level of internet development and agriculture mechanization in a county enhances the positive effect of meteorological services; The positive impact of meteorological services is more pronounced in central and western regions and major grain-producing areas;The effectiveness of policy increases with the proportion of extreme weather and the scale of operations of the county. Accordingly, it is recommended to optimize the agricultural meteorological disaster risk assessment system, establish a digital network for climate information dissemination, and leverage the role of agricultural meteorological personnel to achieve sustained agricultural economic growth.
式中:Yit 为农业经济增长;i为县域;t为年份;DID it 为气象服务。为常数项,为气象服务变量待估系数,为各控制变量待估系数,为县域固定效应,为时间固定效应,为随机干扰项。为控制变量,分为地理条件、气候条件、社会经济条件、农业发展条件4个维度。本研究借鉴龚斌磊等[10]的处理方法,分别生成事前控制变量与时间固定效应交互项。通过以上方式控制政策实施前不同地区可能存在的时间趋势差异。
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