| As digital technologies such as big data,cloud computing and artificial intelligence increase their impact on the economy,cross-border trade in digital services has created a new engine for global trade growth.Global exports of digital services have nearly quadrupled since 2005,growing at an average annual rate of 8.1%,outpacing the exports of goods and other services.However,restrictive measures introduced by different countries have become key barriers to international digital services trade,which will have a negative impact on its development and weaken the benefits of digitalization.Therefore,from the perspective of "binary margin" in the field of trade,it is of great significance to study the influence of current national digital service trade barriers on digital service export,and explore the mechanism and heterogeneity,which can provide references for future policy making.Based on this,this paper firstly reviews the existing literature,then makes a theoretical analysis,finally uses the panel data of 49 countries from 2014 to 2019,and the method of PPML estimation with HDFE,to conduct an empirical study.The results show that the digital service trade barriers of both sides have a significant restraining effect on digital service export,and the effect of exporting country is greater than that of importing country.From the perspective of binary margin,the restraining effect of barriers in exporting countries is along both intensive and extensive margins,importing countries achieve this only through intensive margin.For different policy areas of digital service trade barriers and different industries of digital service export,the effects are heterogeneous.In addition,increasing trade costs is the intermediary mechanism,and this mechanism plays a role mainly through intensive margin.Finally,this paper puts forward policy recommendations: China should vigorously foster international competitiveness in the field of digital service trade,actively participate in and promote the formulation and negotiation of relevant international rules,reasonably reduce the strict barriers in digital service trade,and pay attention to the promotion of intensive margin,strengthen the resilience and the high-quality development of our foreign trade. |
