The Amazon rainforest, the world's largest and most biodiverse, represents a global public good of which 15 percent has already been lost. The worldwide value of preserving the remaining forest is today unknown. A "Delphi" exercise was conducted

This chapter is both a commentary on and extension of the Carson and Groves (2007) (hereafter CG) article reprinted in this volume. The substantial attention the paper has received has been enormously gratifying. Reception of CG has largely been positive with little if any substantive criticism...