取締役会ガバナンス機構を通じたサステナビリティ報告品質の解明：サブサハラ・アフリカからの証拠
Unveiling the Path of Sustainability Reporting Quality Through Board Governance Mechanisms: Evidence From Sub‐Saharan Africa (原題)
Samuel Anaba, Uwalomwa Uwuigbe, Haruna Issahaku
🤖 gxceed AI 要約
日本語
サブサハラ・アフリカ上場企業1530社・年（2015〜2024年）を対象に、取締役会属性がサステナビリティ報告の品質に与える影響をパネル固定効果およびシステムGMMで分析した研究。取締役の独立性、女性比率、財務・監査・サステナビリティの専門性が高いほど報告の信頼性が向上する一方、取締役会規模は調整・監視コストの増大により負の効果を持つことを示す。制度的枠組みが弱い地域における企業統治の役割を実証した点に新規性がある。
English
Using 1,530 firm-year observations (2015–2024) from listed Sub-Saharan African firms, this study applies panel fixed effects and system GMM to test how board attributes shape sustainability reporting quality. Board independence, female representation, and financial/audit/sustainability expertise improve report credibility, while larger boards show negative effects due to coordination costs. It offers rare empirical evidence on governance-driven disclosure quality in a weak-institution region.
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
日本ではSSBJ基準・有価証券報告書でのサステナビリティ開示が拡大する中、取締役会の属性（独立性・多様性・専門性）が開示品質を左右するという知見は、日本企業の開示ガバナンス体制構築や社外取締役の役割設計を考える上で示唆に富む。新興国・制度基盤の弱い市場での実証は、日本企業のサプライチェーン・エマージング市場投資先の評価にも応用できる。
In the global GX context
Amid ISSB/CSRD-driven global convergence on sustainability disclosure, this paper adds evidence that board composition—independence, gender diversity, and sustainability expertise—is a measurable determinant of disclosure quality, complementing TCFD/ISSB governance-pillar scholarship. Its focus on a weak-institution region broadens the disclosure-governance literature beyond advanced economies and informs assurance and oversight debates in emerging markets.
👥 読者別の含意
🔬研究者:取締役会属性と開示品質の因果関係を新興国データで示す実証枠組みとして、ガバナンス・開示研究の比較分析に活用できる。
🏢実務担当者:取締役会の多様性・専門性強化と外部保証の導入がサステナビリティ報告の信頼性向上に寄与することを示す実務的根拠となる。
🏛政策担当者:制度基盤が弱い市場において、取締役会構成や外部保証に関する規制・ガイドライン整備の必要性を裏付ける証拠を提供する。
📄 Abstract（原文）
ABSTRACT The study examines how board governance mechanisms influence the quality of sustainability reporting among listed firms in Sub‐Saharan Africa, where weak institutional frameworks increase the need for strong corporate oversight. The research employed a sample of 1530 firm‐year observations from 2015 to 2024, and applied panel fixed effects and Generalized Method of Moments (GMM) in system models to estimate the results. The findings reveal that board attributes plays a key role in shaping the quality of sustainability disclosures across the models. The novelty of this study lies in its emphasis on board governance supporting environmental sustainability over social and economic dimensions. Firms with more independent board members, higher female representation, and directors with financial, auditing, and sustainability expertise produce more credible sustainability reports. These board attributes strengthen oversight and enhance transparency and accountability. However, board size has a negative effect, suggesting that large boards may face coordination and monitoring challenges. This study contributes new evidence by extending sustainability reporting literature in Sub‐Saharan Africa, a region that remains unexplored. The results offer practical insights for firms and policymakers. Companies are encouraged to maintain a sizable board of directors that would strengthen board composition through diversity and relevant expertise. Improving external assurance of sustainability reports is also important for building trust and accountability.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/csr.71077first seen 2026-10-24 04:50:03 · last seen 2026-11-06 05:02:07
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