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サブサハラ・アフリカにおける都市化、電力アクセス、クリーンエネルギー移行：アクセスと構成のマージンを区別する

Urbanisation, Electricity Access, and the Clean Energy Transition in Sub-Saharan Africa: Distinguishing the Access and Composition Margins (原題)

Ibrahim, Abdul-Jalil, Mohammed, Issah, Alemzeroq, David, Ofoeda, Issac

Zenodoプレプリント2026-09-01#エネルギー転換Origin: Global対象セクター: power
DOI: 10.5281/zenodo.22216357
原典: https://zenodo.org/records/22216357

🤖 gxceed AI 要約

日本語

サブサハラ・アフリカ48カ国のパネルデータを用い、都市化が電力アクセスを増加させる一方、再生可能エネルギー比率の向上には寄与しないことを実証。化石燃料依存は所得に依存し、高所得でのみ減少する。電化と脱炭素は別次元であり、分散型太陽光やミニグリッドの導入と再生可能比率のモニタリングを提言。

English

Using panel data from 48 Sub-Saharan African countries, this study finds that urbanization increases electricity access but does not raise the renewable share of supply. Fossil dependence is income-contingent, declining only at high income levels. The authors recommend embedding renewables at the point of connection and monitoring renewable shares to align SDG 7 and 11.

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

日本のGX文脈では、途上国支援やJICAのインフラ協力において、電化と脱炭素を別々に扱うべきという示唆は、ODAや国際協力の設計に参考になる。また、再生可能エネルギー比率のモニタリング指標の重要性は、日本のエネルギー政策にも示唆を与える。

In the global GX context

This paper contributes to global GX scholarship by empirically distinguishing access and composition margins of energy transition, relevant for SDG 7 and climate policy in developing regions. It underscores that electrification alone does not guarantee decarbonization, informing international development finance and renewable energy strategies.

👥 読者別の含意

🔬研究者:Provides a methodological framework for separating access and composition margins in energy transition studies.

🏢実務担当者:Highlights the need to integrate renewable generation in electrification projects, relevant for utilities and development agencies.

🏛政策担当者:Informs policies that couple electrification with renewable targets, especially in Sub-Saharan Africa.

📄 Abstract（原文）

Purpose. Sub-Saharan Africa is urbanising faster than any other world region while remaining the least electrified, yet whether urbanisation accelerates or impedes the clean-energy transition remains unresolved. This paper distinguishes the access margin of the transition (electricity access) from the composition margin (the renewable content of supply), a distinction largely overlooked in the literature, and tests whether urbanisation's effect on fossil dependence is contingent on income. Methodology. Using an annual panel of 48 Sub-Saharan African countries over 2000–2021, and to address non-stationarity, cross-sectional dependence, and heterogeneous dynamics, the analysis combines fixed-effects models with Driscoll–Kraay inference, system GMM, a pooled mean group error-correction estimator, mediation analysis, and threshold models. Findings. Three results emerge. First, urbanisation robustly increases electricity access, with a stable long-run equilibrium relationship. Second, greater access does not translate into a higher renewable-electricity share, and mediation analysis finds no indirect pathway from urbanisation to renewables through access. Third, urbanisation's association with fossil dependence is income-contingent as it raises the fossil share across most of the region's income range as households move from biomass into commercial fossil energy, weakening as income rises and turning negative only near US$8,000 per capita, a level reached by fewer than one country-year in fifteen. Across countries, income rather than urbanisation is the master variable. Recommendations. Electrification and decarbonisation are distinct dimensions that should not be assumed to progress together. Electrification strategies should embed renewable generation at the point of connection by prioritising decentralised solar and mini-grids and monitoring should track the renewable-electricity share rather than the biomass-inflated aggregate, so that Sustainable Development Goals 7 and 11 advance together.

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