关键词: 生产性服务业集聚, 粮食可持续安全, 空间溢出效应, 中介效应, 要素错配

Abstract: The agglomeration of producer services points out a new direction for sustainable food security and is of great significance for guaranteeing agricultural and rural modernization and realizing rural revitalization. Based on the panel data of 31 provinces in China, the sustainable food security level index was constructed, and the spatial econometric model and nonlinear intermediary effect model were used to explore the impact of producer services agglomeration on sustainable food security and its mechanism. The results show that the primary and secondary coefficients of the direct effect of producer services agglomeration on sustainable food security are 0.818 and -0.368, respectively, and the primary and secondary coefficients of the spatial spillover effect are 3.922 and -1.600, respectively, showing an inverted “U” shape. However, the current agglomeration level in most regions has not yet crossed the inflection point value. The effect of highend producer services agglomeration on the improvement of sustainable food security level is weaker than that of lowend producer services agglomeration. The effect of producer services agglomeration on sustainable food security in eastern and central regions is better than that in western regions. Producer services agglomeration improves sustainable food security by alleviating the mismatch of capital and labor factors. In the future, it is necessary to accelerate the agglomeration of producer services, actively guide the agglomeration of high-end industries, give full play to the positive spatial spillover effect, carry out reasonable agglomeration of producer services according to local conditions, and clear the nonlinear path of factor mismatch to ensure sustainable food security.

Key words: producer services agglomeration, sustainable food security, spatial spillover effect, intermediary effect, factor mismatch