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エネルギー効率の資金調達：障壁、手段、拡大への道筋

Financing energy efficiency: Barriers, instruments, and pathways to scale (原題)

Paolo Bertoldi

Eceee ... summer study proceedings📚 査読済 / ジャーナル2026-08-17#省エネOrigin: Global経営インパクト: コスト削減対象セクター: cross_sector
DOI: 10.66506/essp.3-176-26
原典: https://doi.org/10.66506/essp.3-176-26
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🤖 gxceed AI 要約

日本語

エネルギー効率は最も費用対効果の高い排出削減策であるにもかかわらず、投資ギャップが大きい。本論文は、その障壁（小規模・断片的なプロジェクト、融資機関のリスク回避、スプリット・インセンティブ等）を分析し、伝統的な公的資金から市場ベースのメカニズム（ESCO、オン・ビル融資、PACE、ホワイト証書、炭素税等）まで多様な手段を検討する。結論として、単一の手段では不十分であり、公的支援・リスク移転・市場インセンティブを組み合わせた多層的な政策アーキテクチャが重要と主張する。

English

Energy efficiency is the most cost-effective way to cut emissions, yet a large investment gap persists. This paper analyzes barriers (small fragmented projects, lender risk aversion, split incentives) and examines instruments from public subsidies to market-based mechanisms (ESCOs, on-bill financing, PACE, white certificates, carbon pricing). It concludes that no single instrument suffices; a layered policy architecture combining public support, risk transfer, and market incentives is needed to close the financing gap.

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、省エネ投資の促進がGX実現の鍵であり、省エネ法やGX経済移行債などの政策と関連。本論文の多層的政策アーキテクチャの提言は、日本の省エネ補助金やESCO市場の設計に示唆を与える。

In the global GX context

Globally, energy efficiency financing is central to climate goals and aligns with ISSB/CSRD disclosure of transition plans. The paper's comparative analysis of instruments offers evidence for policymakers designing blended finance and de-risking mechanisms, relevant to transition finance frameworks.

👥 読者別の含意

🔬研究者:Provides a comprehensive taxonomy and evidence review of energy efficiency financing instruments, useful for further empirical research.

🏢実務担当者:Offers insights into selecting and combining financing mechanisms for energy efficiency projects, relevant for corporate sustainability teams.

🏛政策担当者:Highlights the need for layered policy architecture combining public and market-based instruments to close the financing gap.

📄 Abstract（原文）

Peer-reviewed paper 3-176-26 Energy efficiency is widely recognised as the most cost-effective solution available to reduce energy consumption, cut greenhouse gas emissions, and enhance energy security. Yet a persistent and large investment gap separates what is economically justified from what is actually financed. This paper analyses the barriers that explain this gap, from small and fragmented projects to the risk aversion of commercial lenders and structural split incentives that misalign costs and benefits, and examines the principal instruments developed to address them. The analysis proceeds from traditional public financing tools, subsidies, grants, fiscal incentives, and zero-or low-interest loans, through progressively more market-based mechanisms: Energy Performance Contracts delivered by energy service companies, Pay-As-You-Save and on-bill financing, Property-Assessed Clean Energy financing, green mortgages, white certificate obligation schemes, feed-in tariffs for energy savings, and carbon taxes and emissions trading systems revenues as sources of public co-financing. The paper further examines cross-cutting enablers, including de-risking instruments, project aggregation, one-stop shops, and secondary markets. For each instrument, it considers the underlying logic, the market failure addressed, the empirical evidence on effectiveness, and the conditions for success or failure. The paper concludes that no single instrument is sufficient: a layered policy architecture combining direct public support, risk transfer mechanisms, and market-based incentives calibrated to national context and sector offers the most robust pathway to closing the energy efficiency financing gap.

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