On Pollution Permit Banking and Market Power
We consider a pollution permit market with a large firm and fringe of competitive firms. To smooth compliance towards a long-run emissions goal, firms are initially allocated a stock (i.e., bank) of permits that can be gradually consumed. We first show how the large firm can credibly manipulate the spot market in subgame-perfect equilibrium. Motivated by features observed in the US market for sulfur dioxide emissions, we then show that the introduction of stock transactions has no effects on market power, but that forward trading and incomplete observability of stock holdings do have pro-competitive effects. Copyright Springer Science+Business Media, Inc. 2006
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