| Sumario: | Motivated by the structure of existing pollution permit markets, we study the equilibrium path that results from allocating an initial stock of storable permits to an agent, or a group of agents, in a position to exercise market power. A large seller of permits exercises market power no differently than a large supplier of an exhaustible resource. However, whenever the large agent's endowment falls short of his efficient endowment — allocation profile that would exactly cover his emissions along the perfectly competitive path — market power is greatly mitigated by a commitment problem, much like in a durable-goods monopoly. We illustrate our theory with two applications: the US sulphur market and the international carbon market that may eventually develop beyond the Kyoto Protocol. Reprinted by permission of the publisher.
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