1. Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil.
2. Institute for Food and Resource Economics and Center for Development Research, University of Bonn, Bonn, Germany.
3. Escola Superior de Conservação Ambiental e Sustentabilidade–IPÊ, Nazaré Paulista 12960-000, Brazil.
4. Stockholm Environmental Institute, Stockholm, Sweden.
5. University of Wisconsin, Madison, WI, USA.