Rodrigo Arriagada,^* Charles Perrings<sup>**


*</sup>Rodrigo Arriagada () is a Assistant Professor in the Department of Agricultural Economics at the Pontificia Universidad Catolica de Chile. Dr. Arriagada is also an associated research fellow for Environment for Development (EfD) initiative in Central America and ecoSERVICES Group at Arizona State University. His fields of specialization are environmental economics, program evaluation econometrics, applied microeconomics and development economics. Dr. Arriagada's current research interests focus on environmental economics and policy, the use of experimental and quasi-experimental program evaluation methods on conservation interventions, deforestation and land use, issues at the intersection of economic development and environmental protection. Address: Department of Agricultural Economics, Pontificia Universidad Católica de Chile, Avenida Vicuna Mackenna 4860 Macul, Santiago, Chile. e-mail: rarriagadac@uc.cl
^**Charles Perrings is a Professor of Environmental Economics at Arizona State University (ASU). Previous appointments include Professor of Environmental Economics and Environmental Management at the University of York; Professor of Economics at the University of California, Riverside; and Director of the Biodiversity Program of the Beijer Institute, Royal Swedish Academy of Sciences, Stockholm, where he is a Fellow. At ASU, he directs (with Ann Kinzig) the ecoSERVICES Group within the College of Liberal Arts and Sciences. The Group studies the causes and consequences of change in ecosystem services—the benefits that people derive from the biophysical environment. It analyses biodiversity change in terms of its impacts on the things that people care about. Address: ecoSERVICES Group, School of Life Sciences, Arizona State University, Box 874501, Tempe, AZ 85287-4501, USA. e-mail: Charles.perrings@asu.edu