Adopt or Innovate : Understanding Technological Responses to Cap-and-Trade

Environmental regulations have consistently been found to spur innovation in ‘clean' technologies, with one significant exception. Past cap-and-trade programs have encouraged adoption of existing pollution control technologies, but had little effect on innovation. Several explanations have been offered, including secondary market failures and a lack of polluter sophistication. In this paper I argue that it likely has more to do with the state of the technologies. Using a newly constructed panel of British companies, I show that the European carbon market - the world's largest cap-and-trade program - has, contrary to past experience, encouraged innovation rather than adoption. I discuss how these contrasting findings can be reconciled, and the implications for planned reforms