3Gorm. Kipperberg, 'A Comparison of Household Recycling Behaviors in Norway and the United States' ,Environmental and Resource Economics, 2007,36: 215 - 235.
4Pierre Desrochers (2008), 'Did the Invisible Hand Need a Regulatory Glove to Develop a Green Thumb? Some Historical Perspective on Market Incentives, Win-Win Innovations and the Porter Hypothesis' ,Environment Resource Economics, 2008,41:519-539.