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The threshold effect of climate finance on carbon dioxide emissions in sub-Saharan Africa

サブサハラアフリカにおける気候資金が二酸化炭素排出に与える閾値効果 (AI 翻訳)

Edmund Kwablah, Benjamin Amoah, Jemima Abena Yakah Amoah, Anthony Amoah

Discover Energy📚 査読済 / ジャーナル2026-06-08#気候金融Origin: Global
DOI: 10.1007/s43937-026-00161-4
原典: https://doi.org/10.1007/s43937-026-00161-4

🤖 gxceed AI 要約

日本語

本研究は、2000~2022年のサブサハラアフリカにおける気候資金とCO2排出の閾値効果を分析。FMOLS等を用いた結果、気候資金が低水準では排出増加、閾値(約2兆ドル)超で減少する逆U字型関係を確認。低所得国ではU字型、中所得国では非線形効果は有意でない。気候資金の段階的投資の重要性を示す。

English

This study examines the threshold effect of climate finance on CO2 emissions in sub-Saharan Africa (2000-2022). Using FMOLS, it finds an inverted U-shaped relationship: low levels of climate finance increase emissions, but beyond a threshold of about $2 trillion, further finance reduces emissions. Low-income countries show a U-shape, while middle-income countries show no significant nonlinearity. Results support the EKC hypothesis and highlight the need for sustained climate finance investment over 43 years.

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

本論文はサブサハラアフリカのデータに基づくが、日本のGX戦略(例:アジア太平洋地域での気候資金支援)にも示唆を与える。気候資金の段階的効果を定量化した点は、日本の国際協力における資金配分の参考となる。

In the global GX context

This paper contributes to global climate finance literature by empirically demonstrating a threshold effect in sub-Saharan Africa. It informs debates on the effectiveness of climate finance for developing countries and supports the need for sustained investment, relevant for international climate policy under UNFCCC and SDG 13.

👥 読者別の含意

🔬研究者:Provides robust econometric evidence of nonlinear climate finance-emissions nexus, useful for further modeling.

🏛政策担当者:Highlights that climate finance requires long-term commitment to exceed a threshold for emissions reduction, informing development finance strategies.

📄 Abstract(原文)

This research explores the threshold effect of climate finance on carbon dioxide emissions in sub-Saharan Africa spanning the period 2000–2022. The regression equation was estimated using FMOLS, whereas POLS and DOLS were used to check for robustness. The results indicate a nonlinear association between climate finance and CO 2 emissions: at lower levels, climate finance is associated with higher emissions, while beyond a threshold further increases are associated with lower emissions, validating the inverted U-shaped EKC hypothesis. We estimate the threshold effect of US$2 trillion, derived from the quadratic urning point in the logged model and estimate a 43-year period of sustained climate finance investment to meet the threshold target. For middle-income countries, the nonlinear pattern is not statistically significant. For low- income countries, the estimates are consistent with a U-shaped relationship. The results further demonstrate that in both non-oil- and oil-producing countries, the initial infusion of climate finance worsens environmental quality until, at a certain threshold, further injections of climate finance reduce environmental pollution, an objective consistent with SDG 13 (Climate Action). Policy recommendations are drawn from the results obtained from the study.

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