There have been five large tradable permit programs (US Acid Rain Program, US Nitrogen Budget Program, Los Angeles Regional Clean Air Management Program, EU Emissions Trading Scheme, and the US Lead Phase Down) in effect long enough to have potentially yielded data to test whether the program...

A number of countries offer domestic consumers the option of buying their electricity supply through a ‘green tariff’, whereby the supplier typically guarantees that all or part of the supply has been generated using renewable energy sources. Previous studies that have sought to identify...