1. Center for Conservation Biology, Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA.
2. Institute of Earth Systems, Science and Policy, CSU Monterey Bay, 100 Campus Center, Seaside, CA 93955–80013, USA.
3. Yale Law School, 127 Wall Street, New Haven, CT 06511, USA.
4. Institute for Agriculture and Trade Policy, 2105 First Avenue South, Minneapolis, MN 55404, USA.