Cornell University - Charles H. Dyson School of Applied Economics & Management, Cornell University, World Argoforestry Centre (ICRAF), World Argoforestry Centre (ICRAF), Cornell University - Department of Economics, affiliation not provided to SSRN, Cornell University, Cornell University, World Argoforestry Centre (ICRAF), Cornell University, affiliation not provided to SSRN, Cornell University, Cornell University, Cornell University - New York State Water Resources Institute and World Argoforestry Centre (ICRAF)