8Levine R.,More on Finance and Growth:More Finance,More Growth?[J].The Federal Reserve Bank of St.Louis,July/August,2003,31~46.
9Levin A.and C.F.Lin,Unit Root Test in Panel Data:Asymptotic and Finite Sample Properties,Discussion Paper #92-93,University of California at San Diego.1992.
10Lucas,Robert E.,On the Mechanics of Economic Developrnent[J].Journal of Monetary Economics,1988,22(1):3-42.