区域一体化、市场整合与粮源异质性——以长三角大中城市为例

Regional Integration,Market Integration and Grain Source Heterogeneity——Taking Large and Medium-sized Cities in the Yangtze River Delta as an Example

本文以稻米、小麦和大豆三类粮食品种为研究对象,在考虑交易成本的基础上应用门限向量误差修正模型测算了长三角地区城市间的粮食市场整合程度,并基于市级面板数据探析了区域一体化对粮食市场整合程度的影响及其对不同粮源的市场整合程度的异质性效应。研究发现:①长三角地区外来粮源市场整合程度低于自有粮源;②区域一体化对提高粮食市场整合程度存在显著正向影响,农业现代化水平的提高也会对区域内部粮食市场整合产生正向作用;③外来粮源相比自有粮源在区域一体化过程中能获得更强的市场整合促进效应。

Taking rice,wheat and soybean as the research objects,this paper applies the threshold vector er-rorrcorrection model to analyze the degree of grain spatial market integration among cities in the Yangtze River Delta region considering the transaction cost.And based on the city-level panel data,this article analyzes the influence of regional integration on the degree of food market integration and its heterogeneous effect on the degree of market integration of different grain sources.The results show that:①The integration degree of external grain market in Yangtze River Delta is lower than that of its own.②Regional integration has a positive impact on improving the de-gree of grain market integration,and the improvement of agricultural modernization level will also have a positive effect on promoting regional grain market integration.③Compared with the self owned grain sources,the external grain sources can obtain stronger market integration promotion effect in the process of regional integration.