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Policy Options for Addressing Greenhouse Gas 'Leakage'
March 5, 2009

A major stumbling block toward adopting significant policies for reducing greenhouse gas emissions is concern over the lack of emissions pricing on the part of key trade partners.  If the policy causes a shift in production to nations with weak or non-existent greenhouse gas regulation, the resulting “leakage” will both erode its environmental benefits and increase its costs.

A suggested remedy for the leakage problem is the imposition of border adjustments, including taxes on (or allowance requirements for) imports from countries with less-stringent regulations and subsidies for domestic firms’ exports to level the playing field abroad. In a new study, RFF Senior Fellow Carolyn Fischer and the International Trade Commission’s Alan Fox examine the economic and legal implications of four approaches to dealing with potential leakage: a border tax on imports, a border rebate for exports, full border adjustment (tax plus rebate), and a rebate covering all domestic production (as might be implemented with output-based allocation of emissions allowances).

  DP 09-02
Comparing Policies to Combat Emissions Leakage
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They find that not only might border adjustment policies raise concerns within the World Trade Organization, they also come with important tradeoffs. While they promote domestic production, none would necessarily be effective at reducing global emissions or leakage in a given sector, because shifting production back home also increases domestic emissions.

Fischer and Fox conclude that under plausible assumptions, it seems likely that for most U.S. sectors a full border adjustment is most effective at reducing global emissions. But when import adjustments are limited for reasons of WTO compatibility, a domestic rebate can be more effective at limiting emissions leakage and encouraging domestic production.

They wrap up by identifying a set of key issues for policymakers to consider in evaluating policies to combat leakage:

  • A domestic rebate will tend to raise allowance prices overall, and shift costs among sectors. In particular, it is not advised for energy-producing sectors where the production rebate undermines incentives for cost-effective conservation efforts.

  • Border adjustments or other trade-related policies risk providing political cover for unwarranted and costly protectionism and may provoke trade disputes with other nations.

  • Many of our largest trade partners like the European Union and Canada are implementing emissions pricing, thus limiting the leakage concern and any allocation scheme must consider how preferential treatment will be phased out. 
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