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Border Carbon Adjustments Revisited

国境炭素調整（BCA）の再検討 (AI 翻訳)

Christoph Böhringer, Andre Müller Jan Schneider, Carolyn Fischer, Thomas F. Rutherford

CESifo📚 査読済 / ジャーナル2026-06-15#炭素価格Origin: Global経営インパクト: 調達リスク対象セクター: cross_sector
DOI: 10.65864/txmg55siv6
原典: https://doi.org/10.65864/txmg55siv6
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🤖 gxceed AI 要約

日本語

本論文は、国境炭素調整（BCA）が単独の炭素価格政策の経済的負担をどのように変化させるかを、大規模な計算可能な一般均衡モデルを用いて体系的に感度分析した。BCAの設計、需給の価格反応性、各国の生産・消費・貿易パターンの初期不均一性の3つの次元が影響を左右することを示した。

English

This paper provides a systematic sensitivity analysis of border carbon adjustments (BCA) using a large-scale computable general equilibrium model. It examines how BCA design, price responsiveness, and initial heterogeneities across countries affect the economic burden of unilateral carbon pricing, informing the policy debate on competitiveness and carbon leakage.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本でもカーボンプライシング導入が検討されており、国境炭素調整の設計は輸出産業への影響を左右する。本論文の感度分析は、日本の政策設計における定量的根拠として有用である。

In the global GX context

BCA are a key instrument in the global climate policy toolbox, especially for economies like the EU with unilateral carbon pricing. This study's systematic approach helps disentangle the effects of design choices and economic structures, relevant for ISSB/TCFD discussions on carbon pricing disclosure.

👥 読者別の含意

🔬研究者:Provides a comprehensive sensitivity analysis framework for BCA impacts, useful for modelers and policy analysts studying carbon leakage.

🏢実務担当者:Offers insights into how BCA design affects the competitiveness of energy-intensive industries, relevant for corporate climate risk assessment.

🏛政策担当者:Delivers evidence on the distributional effects of BCA design choices, crucial for designing equitable and effective border carbon adjustments.

📄 Abstract（原文）

To address concerns about competitiveness and carbon leakage, countries with ambitious climate policies are increasingly looking to combine unilateral carbon pricing with border carbon adjustments (BCA). BCA aim to create a level playing field between domestically regulated energy-intensive and trade-exposed industries and their competitors abroad by imposing charges on the (unpriced) carbon embodied in imports and (potentially) rebating carbon costs on exports. At the same time, BCA are seen as measures that may have protectionist motivation and shift the burden of climate policy onto poorer developing economies that bear less historical responsibility for climate change, have limited financial and technological capacity for decarbonization, and may depend on CO₂-intensive exports. For an informed policy debate, understanding how BCA alter the economic burden of unilateral emissions pricing across all countries is essential. However, quantitative impact estimates derived from ex-ante simulation analyses vary considerably in the applied economic literature due to divergent assumptions on key drivers whose relative importance is difficult to distinguish from the outset. Based on controlled simulations with a large-scale computable general equilibrium model of global trade and carbon use, this paper provides a systematic sensitivity analysis of three fundamental dimensions that determine the impacts of BCA: (i) the policy design of BCA; (ii) the price responsiveness of supply and demand; and (iii) the input-output data characterizing initial heterogeneities of production, consumption, and trade patterns across countries.

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