区域互联网深化、信息摩擦与进口增长——基于进口二元边际视角  

Regional Internet Deepening,Information Friction and Import Growth——Based on the Perspective of Import Binary Margins

作　　者：庄金凤 马野青[1] 王冠宇 ZHUANG Jin-feng;MA Ye-qing;WANG Guan-yu(School of Business,Nanjing University,Nanjing 210093,China)

机构地区：[1]南京大学商学院,江苏南京210093

出　　处：《山西财经大学学报》2025年第1期72-85,共14页Journal of Shanxi University of Finance and Economics

基　　金：教育部重点研究基地南京大学长三角经济社会发展研究中心“十四五”规划重大项目“开放发展与长三角区域高质量一体化发展研究”(22JJD790035)。

摘　　要：信息技术发展是驱动城市数字经济发展和高水平对外开放的基础。基于此,创新性地提出考虑信息摩擦作用的垄断竞争分析框架,并从进口二元边际视角实证检验区域互联网深化对进口增长的作用。研究发现,区域互联网深化能显著促进进口规模扩张,增长来源于进口价格、进口数量与进口种类,主要影响机制为降低信息摩擦。异质性分析表明,低对外贸易开放城市互联网深化显著降低了进口产品数量。进一步讨论发现,区域互联网深化对进口“数量”增长及“质量”增长均有促进作用。The development of information technology is the foundation for driving the digital economy and high-level opening up of cities.Based on this,the paper proposed an innovative competition analysis framework,taking into account the role of information frictions.This framework empirically tested the impact of regional internet deepening on import growth from the perspective of import binary margins.The study found that regional internet deepening significantly promoted the expansion of import volumes,with the growth driven by import prices,quantities,and varieties.The primary mechanism of this impact was the reduction of information frictions.Heterogeneity analysis showed that,internet deepening in cities with low levels of foreign trade openness significantly reduced the number of imported products.Further discussion revealed that regional internet deepening had a promoting effect on both the“quantity”and“quality”of imports.

关 键 词：互联网深化 进口广延边际 进口集约边际 信息摩擦 进口产品质量 可变加价 垄断竞争市场 进口贸易 

分 类 号：F49[经济管理—产业经济] F752.8