共 6 条
[1]
[Anonymous], 1998, Principles of economics
[2]
Coast J, 1996, HEALTH ECON, V5, P217, DOI 10.1002/(SICI)1099-1050(199605)5:3<217::AID-HEC200>3.0.CO
[3]
2-S
[4]
Farnham P. G., 1996, PREVENTION EFFECTIVE, P12
[5]
Kolstad C. D., 2000, Environmental economics
[6]
Mansfield, 1982, MICROECONOMICS THEOR