8M. Jensen , W. Meckling. Theory of the Firm: Managerial Behavior: Agency Costs and Capital Structure [J]. Journal of Financial Economics, 1976 , (3) .
9R. Townsend. Optimal Contracts and Competitive Markets with Costly State Verification [ J ]. Journal of Economic Theory, 1979, (21) .
10S. Grossman , O. Hart. The Costs and Benefits of Ownership: A Theory of Vertical and Lateral Integration [ J ]. Journal of Political Economy , 1986 , (94) .