//-->
Estimating the impact on efficiency of the adoption of a voluntary environmental standard : an empirical study of the global copper mining industry
Tole, Lise, (2011)
Les engagements volontaires de l'industrie : un mode original de réglementation environnementale
Börkey, Peter, (1998)
Voluntary agreements in environmental policy
Šauer, Petr, (2001)
Is there an environmental Kuznets curve for deforestation?
Koop, Gary, (1999)
Deforestation, distribution and development
Koop, Gary, (2001)
Measuring the health effects of air pollution : to what extent can we really say that people are dying from bad air?
Koop, Gary, (2004)