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How do policies mobilize private finance for renewable energy?—A systematic review with an investor perspective

Friedemann Polzin, Florian Egli, Bjarne Steffen and Tobias S. Schmidt

Applied Energy, 2019, vol. 236, issue C, 1249-1268

Abstract: With the urgency of climate change, and billions spent globally on renewable energy (RE) support policies, it is crucial to understand which policies are effective. Substantial scholarly research on RE deployment policies has been carried out over the last two decades, resulting in inconclusive findings regarding the effectiveness of mobilizing private finance. Here, we take a novel perspective and review 96 empirical studies concerning the impact of policies on two key investor decision metrics: investment risk and investment return. Only if both metrics correspond to the investors’ expectations are they willing to engage in RE projects. First, our rigorous literature review shows that effective policies address risk and return simultaneously. Second, we find that generic instrument design features, such as credibility and predictability (continuous evaluation and monitoring), considerably impact investment risk. A more focused analysis of the specific design elements of feed-in tariffs, auctions and renewable portfolio standards reveals that these instruments are most effective when they are designed in such a way that they reduce RE project risk while increasing return. We distil important implications for policymakers who aim to foster renewable energy and clean technologies more broadly.

Keywords: Renewable energy; Investment; Policy design; Risk-return; Feed-in tariff; Renewable portfolio standards; Auctions (search for similar items in EconPapers)
Date: 2019
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