The research on the substitution effect between the wireless and fixed telecommunication industry

Wireless telecommunication has developed at a rapid pace than the fixed telecommunication since the last decades of twentieth century. This article analyzes the effect wireless mobile telecom substitutes for the fixed telecom by employing the normal theory of substitution and econometrics model. The analytical results are consistent with the reality, and it has been observed that the relation between the wireless and fixed telecommunication industry has changed from state of being complementary in the early last decades of twentieth century to that of being substituted at present. Moreover, the enhanced progress of telecommunication technology especially in wireless areas enriches customers＇ demands in terms of multimedia contents thereby changing their communication style, which significantly promotes the rapid growth of wireless mobile communication and strengthens the effect of the substitute.

互联网基础设施建设对产业结构升级、经济增长作用机制的实证研究

为探寻互联网基础设施建设对产业结构升级与经济增长的作用机制及其在中国的具体表现,采用理论分析以及混合回归、固定效应模型与系统GMM模型的研究方法,对2005~2011年、2012~2018年两个时期的中国省级面板数据进行研究。研究认为,互联网基础设施建设从直接和间接两个环节能显著地推动中国经济增长和产业结构升级,呈现了显著的正向效应,其具体增进机制表现为投资乘数效应、促成制造业发展、需求催化效应、促进技术进步和催生新兴网络服务业等方面;为更好地发展中国互联网基础设施建设,应加快培养互联网基础设施所需的应用型技术人员和研发人才,加强与高校、科研院所的产学研合作促进新兴技术研发和应用,政策支持并培育大型互联网企业形成规模效应,利用“一带一路”建设扩大中国在国际互联网基础设施建设中的影响力。