First Author:   John C Beghin Iowa State University beghin@iastate.edu   Iowa State University, Iowa State University Ames, 50011-1070, USA       http://www.econ.iastate.edu/people/faculty/beghin-john-c Second Author: Mark R Metcalfe US Forest Service metcalfe@fs.fed.us   R5 R0, Regional Office San Francisco, USA   707 562 8848(Phone)