8Frank M Z, Goyal V K. Testing the pecking order theory of capital structure [J]. Journal of Financial Economics, 2003, 67(2):217-248.
9Carpenter R E, Petersen B C. Capital market imperfections, high-tech investment, and new equity financing [J]. Economic Journal, 2002, 112(2) :54-72.
10Hogan T, Hutson E. Capital structure in new technology-based firms: evidence from the Irish software sector [J]. Global Finance Journal, 2005,15 (3) :369-387.