Assessing the performance of coluntary environmental programs: Does certification matter?

Nicole Darnall, Stephen Sides

Research output: Contribution to journalArticlepeer-review

191 Scopus citations


The promotion of voluntary environmental programs (VEPs) as alternative approaches to traditional environmental regulation has fueled numerous researchers to evaluate VEP performance. However, these studies have focused on assessing the environmental performance of a single VEP. As yet, we know little about the overall environmental benefits of these programs. Moreover, questions remain about whether VEPs designed with different monitoring regimes-related to whether programs are self-monitored or undergo external certification-vary in their ability to improve environmental conditions. Using meta-analysis methodology, this article evaluates the aggregated environmental outcomes of U.S. VEPs drawing on data from nine studies and over 30,000 firms. We show that collectively VEP participants do not improve their environmental performance over nonparticipants. Rather, nonparticipants improve their environmental performance by 7.7 percent more than VEP participants. Additionally, nonparticipants improve the environment 24 percent more than participants in self-monitored VEPs, whereas participants in International Standards Organization 14001 as a group exhibit inconclusive environmental performance improvements.

Original languageEnglish (US)
Pages (from-to)95-117
Number of pages23
JournalPolicy Studies Journal
Issue number1
StatePublished - Feb 1 2008
Externally publishedYes


  • Certification
  • Environmental performance
  • Meta-analysis
  • Self-monitoring
  • Voluntary environmental programs

ASJC Scopus subject areas

  • Sociology and Political Science
  • Public Administration
  • Management, Monitoring, Policy and Law


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