How Effective Are Emission Trading Systems in Reducing Emissions? Empirical Evidence from the EU, New Zealand, and the Republic of Korea
排出量取引制度は排出削減にどの程度効果的か？EU、ニュージーランド、韓国からの実証的証拠 (AI 翻訳)
Song Ze, Gal Hochman, Govinda Timilsina
🤖 gxceed AI 要約
日本語
EU-ETSは電力部門で21.3%、総排出量で15.6%の累積削減効果。NZ-ETSは統計的に有意な効果なし（農業セクター対象外）。韓国ETSはフェーズにより効果が変動し、後期に脱炭素化を促進。一般化合成対照法を用いた分析。
English
The EU ETS reduced electricity-sector CO2 by 21.3% and total CO2 by 15.6% cumulatively. New Zealand's ETS had no significant effect due to agricultural exemption. Korea's ETS showed varying effectiveness across phases, becoming a strong decarbonization driver later. Uses generalized synthetic control method.
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
日本は2023年度からGX-ETSを開始しており、主要な排出量取引制度の効果を実証的に比較した本論文は、制度設計や対象セクターの検討に示唆を与える。特に農業セクター除外の影響や制度の段階的強化の効果は日本でも参考になる。
In the global GX context
With the global push for carbon pricing, this paper provides rigorous causal evidence from the EU, NZ, and Korea. It offers important insights for jurisdictions designing or expanding ETS, especially regarding sectoral coverage and phase-in strategies. Relevant for ISSB and transition finance discussions.
👥 読者別の含意
🔬研究者:Provides causal estimates of ETS effectiveness using generalized synthetic control, useful for carbon pricing scholarship.
🏢実務担当者:Offers evidence on ETS design features (sector coverage, phase strength) that can inform corporate carbon management and policy engagement.
🏛政策担当者:Crucial for evaluating ETS as a decarbonization tool, especially the role of sector coverage and phased ambition.
📄 Abstract（原文）
Emission trading schemes are among the primary pricing instruments to reduce greenhouse gas emissions. Currently, more than 35 emission trading schemes are in operation around the world at multinational, national, and subnational levels. How effective these systems are in reducing emissions is a key empirical question. This study examines the effectiveness of three large-scale emission trading schemes implemented by the European Union, New Zealand, and the Republic of Korea in reducing carbon dioxide emissions. The study employs a generalized synthetic control method on data from 2005–20. The findings show that the EU emission trading scheme led to a cumulative reduction of 21.3 percent in carbon dioxide emissions from the electricity sector and 15.6 lower total carbon dioxide emissions, relative to a scenario with no emission trading scheme. In New Zealand, the emission trading scheme had no statistically significant effect on total national carbon dioxide emissions—largely because nearly half of New Zealand’s emissions come from agriculture, a sector not covered by the country’s emission trading scheme. The effectiveness of Korea’s emission trading scheme varied substantially across phases. Although initially it did not halt the rise in emissions, it became a progressively strong driver of decarbonization over time.
🔗 Provenance — このレコードを発見したソース
- openalex https://openknowledge.worldbank.org/entities/publication/27ce98a9-cba9-4270-a785-881b97823085first seen 2026-05-25 04:36:27 · last seen 2026-05-27 04:31:55
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