Abstract
Analyzing and comparing the influence of enterprises S&T input to urban economy in 3 super large city of Beijing, Tianjin and Shanghai by using panel data from 1989-2008 processed by Eviews5.0, the result indicates enterprises S&T activities investment impacts the urban economy positively. In order to enhance the influence of enterprises innovation investment to urban economy, all of the three cities must increase entreprises innovation fund investment and increase the innovation worker’s efficiency.
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