Once an arcane topic even among environmental economists, emissions trading
systems have substantially increased during this past decade in the USA. M
oreover, the implementation of these systems has necessitated increased inv
olvement of professionals in many fields besides economics. This paper revi
ews the practical experience of the six major types of emissions trading sy
stems, focusing on credit market development, participation and results, in
cluding transaction costs. Five more recent applications of emissions tradi
ng also are considered, as well as the possibility of inter-pollutant tradi
ng. While inter-pollutant trading has been successfully used for chlorofluo
rocarbons (CFCs), the applicability of this experience is probably very lim
ited. Additionally, it would be highly premature to attempt an evaluation o
f these newer emissions trading systems, some of which have yet to be even
partially implemented. In order to improve these latter and future programs
, the paper considers the potential contribution of the New Institutional E
conomics (NIE) to emissions trading. The NIE is used to develop theoretical
insights and a series of predictions about the performance of a range of e
missions trading systems. (C) 1999 Elsevier Science B.V. All rights reserve
d.