6Abramowitz M.Resource and output trends in the U- nited States since 1870 [J].American Economic Review, 1956,46, pp.5.-23.
7Solow,Robert M. Technical Change and the Aggregate Production[J].The Review of Economics and Statistics,1957,R. of E.S.39: 312-320.
8William A. Sahlman.The structure and governance of venture-capital organizations [J].Journal of Financial E- conomies, 1990(27):473-521.
9Douglas J. Cumming,Jeffrey G.Maclntosh.Venture Cap- ital Exits in Canada and the United States [J].University of Toronto Law Journal, 2003, (53): 101-200.
10Munari F,Toschi LAssessing the impact of public ven turecapital programmes in the United Kingdom:Do regional characteristicsmatter? [EB/OL].http://ssrn.com/abstract=1539384, 2010-1-0/2010-5-1.
