NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Terminating Links between Emission Trading Programs

William A. Pizer, Andrew J. Yates

NBER Working Paper No. 20393
Issued in August 2014
NBER Program(s):   EEE

Compliance links between CO2 emission trading programs--where firms regulated under one region's tradable permit program can comply using permits from another region, and vice-versa--are beginning to arise as a vehicle to lower costs, increase liquidity, and strengthen institutions while achieving the same environmental outcome. These links are not immutable, however, as highlighted by New Jersey's decision to exit the multi-state Regional Greenhouse Gas Initiative at the end of 2011. This raises the question of how to manage a delink and, in particular, what to do with existing permits that are banked for future use--choices that can have important consequences for market behavior in advance of, or upon speculation about, a delinking event. To examine this question, we consider two delinking policies. One differentiates banked permits by origin, where banked permits originating in one region are only valid for compliance in that region after the delink occurs. The other treats all banked permits the same, with each banked permit being similarly split into two pieces, with one piece valid in one region and the other piece valid in the other region. Using a two-region, two-period model, we describe the price behavior and relative cost-effectiveness of each policy. Treating permits differently generally leads to higher costs, and may lead regional prices to diverge, even when there is only speculation about delinking. We illustrate these results with a numerical example of the EU-Australian link contemplated in 2013.

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Document Object Identifier (DOI): 10.3386/w20393

Published: Pizer, William A. & Yates, Andrew J., 2015. "Terminating links between emission trading programs," Journal of Environmental Economics and Management, Elsevier, vol. 71(C), pages 142-159. citation courtesy of

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