John M. Antle Dept of Agricultural and Resource Economics Oregon State University Ballard Extension Hall Corvallis, OR 97331 john.antle@oregonstate.edu
Jetse J. Stoorvogel Department of Environmental Sciences Wageningen University P.O. Box 37 6700 AA Wageningen, The Netherlands jetse.stoorvogel@wur.nl
Roberto O. Valdivia Dept of Agricultural and Resource Economics Oregon State University Ballard Extension Hall Corvallis, OR 97331 roberto.valdivia@oregonstate.edu
