Since the early 1990s, voluntary programs have played an increasingly prominent role in environmental management in the U.S. and other industrialized countries. Programs have attempted to address problems ranging from climate change and energy efficiency to more localized air and water pollution problems. But do they work? Despite a growing theoretical literature about how and why voluntary programs might be effective, there is limited empirical evidence on their success or the situations most conducive to their approaches. Even less is known about their cost-effectiveness. Getting credible...

Since the early 1990s, voluntary programs have played an increasingly prominent role in environmental management in the U.S. and other industrialized countries. Programs have attempted to address problems ranging from climate change and energy efficiency to more localized air and water pollution problems. But do they work? Despite a growing theoretical literature about how and why voluntary programs might be effective, there is limited empirical evidence on their success or the situations most conducive to their approaches. Even less is known about their cost-effectiveness. Getting credible...