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Prices versus Quantities with Policy Updating

William Pizer and Brian Prest

No 22379, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: This paper considers how policy updates and trading of regulated quantities over time changes the traditional comparative advantage of prices versus quantities. Quantity regulation that can be traded over time leads firms to set current prices equal to expected future prices. A government seeking to maximize net societal benefits can take advantage of this behavior with a sequence of quantity policy updates that achieves the first best in all periods. Under price regulation where current prices remain fixed until future policy changes occur, no such opportunity exists to achieve the first best, and prices are never preferred. However, if we assume policy updates are driven in part by political "noise" rather than maximizing net societal benefits, the result changes and prices can again be preferred. The comparative advantage now depends the relative variance of noise shocks compared to true cost and benefit shocks. This contrasts sharply with the traditional comparative advantage that depends on the relative slopes of marginal costs and benefits. Applied to climate change, we estimate the comparative advantage of intertemporally tradable quantities (over prices) to be $2 billion over five years. This estimate grows if updates occur less frequently or could be made negative by political noise.

JEL-codes: D62 D92 H41 Q58 (search for similar items in EconPapers)
Date: 2016-06
New Economics Papers: this item is included in nep-ger and nep-reg
Note: EEE
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Published as William A. Pizer & Brian C. Prest, 2020. "Prices versus Quantities with Policy Updating," Journal of the Association of Environmental and Resource Economists, vol 7(3), pages 483-518.

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