8Pigou A C. The economics of welfare [ M ]. Macmillan, 1920:5 - 10.
9Knight F H. Some fallacies in the interpretation of social cost[J]. Quarterly Journal of Economics, 1924, 38(8): 582 - 606.
10Yang H, Huang H J. Principle of marginal-cost pricing: How does it work in a general road work[J]. Transportation Research A, 1998, 32( 1 ) : 45 - 54.