利用搜索引擎中的关键词搜索数据所合成的网络消费者信心指数(WCCI),以中国规模以上企业工业增加值(IP)作为测量经济增长的量化指标,首先分别定量描述WCCI和IP序列,而后利用DCC多元GARCH模型和SVAR模型,分析中国网络消费者信心和经济增长的动态相关关系和相互作用情况。结果表明,WCCI与IP之间存在显著的动态相关关系,WCCI可以Granger引起IP的变化,WCCI可以解释约20%的IP波动。
The study exploits the web consumer confidence index( web CCI) based on the web search volume,and measures economic growth by industrial added value( IP). First,the paper describes the WCCI and IP generally,and then analyzes the interaction and dynamic correlation of the two series with DCC-GARCH model and SVAR model. The results indicate that there is significant dynamic correlation between WCCI and IP,and WCCI can cause the changes of IP and explain 20% of the fluctuation of IP.