I am currently working on the issue of payments for environmental services and am wondering if anyone has worked on modeling environmental ethics and the effects that various factors including payments might have on them. regards, Richard _____________________ Richard G. Dudley Portland, Oregon please reply to <mailto:[log in to unmask]> [log in to unmask] <http://www.people.cornell.edu/pages/rgd6/> http://www.people.cornell.edu/pages/rgd6/