统一市场、信息技术与农产品价格--基于新冠肺炎疫情冲击的实证分析  

Unified Market Information Technology and Agricultural Product Price:An Empirical Analysis Based on the Shock of COVID-19 Epidemic

作　　者：张昊[1] 王振霞[1] 李勇坚[1] ZHANG Hao;WANG Zhen-xia;LI Yong-jian(National Academy of Economic Strategy,CASS,Beijing 100006,China)

机构地区：[1]中国社会科学院财经战略研究院,北京100006

出　　处：《当代财经》2022年第2期3-15,共13页Contemporary Finance and Economics

基　　金：国家社会科学基金一般项目"发挥居民消费推动传统产业转型升级的基础性作用研究"(20BJY101)。

摘　　要：以新冠肺炎疫情为外生冲击,可以考察统一市场与信息技术在稳定农产品价格中的作用。基于全国160个批发市场、29种产品的日度价格数据和双重差分方法的实证分析表明,市场分割对新冠肺炎疫情发生后的农产品价格抬升幅度具有显著的放大效应。不过,新冠肺炎疫情并未对农产品全国流转的统一市场格局带来根本性影响,甚至往年除夕以后市场分割度小幅跳升的现象也不再明显。进一步分析表明,市场主体信息化水平的提升是其中的重要原因,而地区间信息化水平差距则对市场整合具有负面作用。这些结论意味着,依托超大规模国内市场,畅通国内大循环和国内统一市场,有助于提升我国应对外部冲击的能力。The outbreak of COVID-10 Epidemic can be used as an external shock to study the role of unified market and information technology in stabilizing the prices of agricultural products.The empirical analysis based on the daily price data of 29 products in 160 wholesale markets across China with the difference-in-difference method shows that market segmentation has a significant amplification effect on the price rise of agricultural products after the occurrence of COVID-19.However,the unified market pattern of farm products circulated in the whole country has not been affected fundamentally by the epidemic,and even the small jump phenomena of market segmentation after the Spring Festival usually seen in previous years is not obvious.Further analysis shows that the improvement of informatization level of market players is one of the important reasons for this,while the gap of informatization level between regions has a negative impact on the integration of the markets.These conclusions suggest that relying on the ultra-large domestic markets and unblocking the domestic cycle and the domestic unified markets will help improve the ability of China to respond to external shocks.

关 键 词：价格波动 统一市场 信息技术 新冠肺炎疫情 

分 类 号：F304.2[经济管理—产业经济] F713