共 5 条
[3]
A Comparison of Willingness to Pay Estimation Techniques From Referendum Questions[J] . Kelly L. Giraud,John B. Loomis,Joseph C. Cooper.Environmental and Resource Economics . 2001 (4)
[5]
Survival Analysis .2 Jenkins. http://www.iser.essex.ac.uk/teaching/degree/stephenj/ec968/pdfs/ec968lnotesv6.pdf . 2005