{"id":22807,"date":"2026-07-01T11:15:23","date_gmt":"2026-07-01T02:15:23","guid":{"rendered":"https:\/\/www.waseda.jp\/inst\/wias\/?p=22807"},"modified":"2026-07-01T11:15:23","modified_gmt":"2026-07-01T02:15:23","slug":"%e9%ab%98%e7%ad%89%e7%a0%94%e7%a9%b6%e6%89%80%e3%82%bb%e3%83%9f%e3%83%8a%e3%83%bc%e3%82%b7%e3%83%aa%e3%83%bc%e3%82%ba-%e3%80%90%e6%96%b0%e3%81%97%e3%81%84%e4%b8%96%e7%95%8c%e5%8f%b2%e5%83%8f-8-5-1-51","status":"publish","type":"post","link":"https:\/\/www.waseda.jp\/inst\/wias\/news\/2026\/07\/01\/22807\/","title":{"rendered":"\u9ad8\u7b49\u7814\u7a76\u6240\u30bb\u30df\u30ca\u30fc\u30b7\u30ea\u30fc\u30ba\u201c\u5730\u7403\u5236\u7d04\u4e0b\u306e\u7d4c\u6e08\u30fb\u6280\u8853\u30fb\u793e\u4f1a\u306e\u6587\u7406\u878d\u5408\u578b\u5b9f\u8a3c\u7814\u7a76\u201c
WIAS RIEEM Seminar\uff087\/24\uff09"},"content":{"rendered":"

\u9ad8\u7b49\u7814\u7a76\u6240\u30bb\u30df\u30ca\u30fc\u30b7\u30ea\u30fc\u30ba\u201c\u5730\u7403\u5236\u7d04\u4e0b\u306e\u7d4c\u6e08\u30fb\u6280\u8853\u30fb\u793e\u4f1a\u306e\u6587\u7406\u878d\u5408\u578b\u5b9f\u8a3c\u7814\u7a76\u201d Interdisciplinary Empirical Research on Economy, Technology, and Society under Planetary Constraints
\nWIAS RIEEM Seminar\uff087\/24\uff09<\/h2>\n

\u4e3b \u65e8 \/ Abstract<\/h5>\n

\u2460Hidemichi Yonezawa<\/strong>
\nTitle: The climate mitigation spillovers of carbon taxes: a systematic CGE modelling scenario analysis<\/strong><\/p>\n

Abstract: Mitigation policy effectiveness heavily depends on how domestic climate actions interact with global markets and foreign policies. As countries pursue Paris Agreement goals at different speeds, concerns about cross-border spillovers and carbon leakage have intensified, prompting some economies to consider anti-leakage measures that could reshape international trade. To support a shared evidence base, this paper provides a systematic modeling assessment of policy asymmetry and coordination across regions.<\/p>\n

Utilizing the ENV-Linkages model\u2014a multi-sectoral, multi-regional recursive dynamic computable general equilibrium (CGE) model\u2014this study simulates a USD 100 carbon tax applied across 16,384 possible regional coalitions. This approach enables a comprehensive examination of sectoral channels and design choices affecting leakage and economic outcomes, expanding significantly upon earlier literature which typically examines only a very limited set of standard coalitions (such as the EU or Annex I regions).<\/p>\n

The simulation results demonstrate that international coordination significantly reduces carbon leakage, with leakage rates converging to a low, tight band once coalitions cover roughly 25% of global emissions. The analysis highlights that leakage concentrates in emissions-intensive trade-exposed (EITE) sectors and is primarily driven by global fossil-fuel price effects. Furthermore, while unilateral actions yield modest domestic GDP impacts, broader coalitions generate substantial spillovers that grow with coalition size, particularly affecting fossil-fuel exporters. Finally, the presentation discusses how policy design shapes these spillovers and outlines future research avenues to enhance country-level granularity and technological spillover modeling.<\/p>\n

\u2461Marie Missao Raude<\/strong>
\nTitle: From auctions to resale: permit flows in the European carbon market<\/strong><\/p>\n

Abstract: This paper investigates the transmission channel between the primary and secondary markets in the European Union Emissions Trading System (EU ETS), focusing on the behaviour of auction winners. As auctions become the primary mechanism for regulators to inject permits into the system, understanding how auction winners influence secondary markets is increasingly important. Using micro-level data, we analyse auction concentration, identify auction winners and examine their net trading positions and permit banking behaviour. Our findings show that auctions are highly concentrated and dominated by a small group of frequent winners, many acting as net sellers on secondary markets while simultaneously increasing their accumulated holdings of permits. These dynamics suggest potential for the exercise of market power from auction winners and highlight the need for enhanced regulatory oversight as the EU ETS evolves.<\/p>\n

\u30d7\u30ed\u30b0\u30e9\u30e0 \/ Program<\/h5>\n

\u2460\u201cThe climate mitigation spillovers of carbon taxes: a systematic CGE modelling scenario analysis\u201d<\/p>\n

Hidemichi Yonezawa
\nSenior Economist, Modelling and Outlooks Team at the OECD Environment Directorate<\/p>\n

\u2461\u201cFrom auctions to resale: permit flows in the European carbon market\u201d<\/p>\n

Marie Missao Raude
\nPostdoctoral researcher Florence School of Regulation Climate at the European University Institute<\/p>\n

\u767b\u58c7\u8005 \/ Speakers<\/h5>\n