Academic title PhD E-mail: alex.pfaff@duke.edu Role at EfD EfD Researchers International Associate Pfaff, Alexander Alexander Pfaff is Associate Professor of Public Policy, Economics and Environment at Duke University, Sanford School of Public Policy. Link to profile Publications Temporary PES do not crowd-out and may crowd-in lab-in-the-field forest conservation in Colombia Ending Ecoservices Payments Does Not Crowd Out Lab-in-the-Field Conservation Can we increase the impacts from payments for ecosystem services? Impact rose over time in Costa Rica, yet spatial variation indicates more potential Leaders’ distributional & efficiency effects in collective responses to policy: Lab-in-field experiments with small-scale gold miners in Colombia. Collective Local Payments for Ecosystem Services: new local PES between groups, sanctions and prior watershed trust in Mexico Show all People | 13 March 2013 TwitterFacebookLinked in