多尺度知识溢出研究——以进出口互动效应为例

刘君洋, 朱晟君

Research on knowledge spillovers at different scales: Taking the interaction effect between import and export as an instance

LIU Junyang, ZHU Shengjun

图3 东中西部地级市内企业的新进口与新出口产品种类数之和的关系

Fig. 3 The relationship between the sum of the new varieties of import and export product categories of firms in China's eastern, central and western prefecture-level cities