4Johansen, S. Statistical analysis of cointegration vectors,Journal of Economic Dynamics and Control, 1988,12 : 231 - 254.
5Johansen, S. and K. Juselius. Maximum Likelihood Estimation and Inference on Cointegration with Applications to the Demand for Money. Oxford Bulletin of Economics and Statistics,1990,52 : 169 - 210.
6Kline S,Rosenberg N.An overview of innovation[C]//Landon R,Rosenberg N.The Positive Sum Strategy.Washington D C:National Academy Press,1986:275 -305.
7Rothwell R.Towards the fifth-generation innovation process[J].International Marketing Review,1994,11 (1):7-32.
8Abernathy W J,Utterback J M.Patterns in industrial innovation[J].Technology Review,1978,50(6-7):40 -47.