記述言語：英語   掲載種別：研究論文（学術雑誌）  

The Impact of Renewable Energy Generation on the Spot Market Price in Germany: Ex-Post Analysis using Boosting Method
This study combines regression analysis with machine learning analysis to study the merit order effect of renewable energy focusing on German market, the largest market in Europe with high renewable energy penetration. The results show that electricity from wind and solar sources reduced the spot market price by 9.64 (sic)/MWh on average during the period from 2010 to 2017. Wind had a relatively stable impact across the day, ranging from 5.88 (sic)/MWh to 8.04 (sic)/MWh, while the solar energy impact varied greatly across different hours, ranging from 0.24 (sic)/MWh to 11.78 (sic)/MWh and having a stronger impact than wind during peak hours. The results also show characteristics of the interactions between renewable energy and spot market prices, including the slightly diminishing merit order effect of renewable energy at high generation volumes. Finally, a scenario-based analysis illustrates how different proportions of wind and solar energies affect the spot market price.

DOI： 10.5547/01956574.41.si1.akee

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Drivers of green bond market growth The importance of Nationally Determined Contributions to the Paris Agreement and implications for sustainability
Green bonds are increasingly being applied to finance emissions reductions, sustainable development, and other cleaner production investments conducive to reaching the 2 °C temperature target of the Paris Agreement. As their markets are relatively nascent, there is a gap in the empirical literature on the drivers of green bond market growth. To assess the impact that capital market growth drivers and Nationally Determined Contributions to the Paris Agreement have on green bond issuance volumes as indicators of market growth, this study employed a structural equation model using a panel dataset of over $300 billion in green bonds issued in 49 countries between 2007 and 2017. This is the first econometric study to demonstrate unique drivers of green bond market growth in addition to factors that similarly affect conventional bond market growth. This is also the first study to construct a normalized index of Nationally Determined Contributions robustness scores to measure their impacts on green bond market growth. Macroeconomic latent factors exerted three times the total influence exerted by institutional latent factors. Institutional effects are positive and indirect, while OECD membership impacts were small and statistically insignificant. Nationally Determined Contributions scores exerted the largest positive and statistically significant impacts among observed variables. These results suggest that Nationally Determined Contributions and other macroeconomic and institutional factors are driving growing green bond issuances that will finance climate and sustainability investments through the future. They also highlight the need for broader examinations of the determinants of green bond issuances as investment vehicles for sustainable outcomes.

DOI： 10.1016/j.jclepro.2019.118643

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Green bonds for the Paris agreement and sustainable development goals
The Paris Agreement under the United Nations Framework Convention on Climate Change and the Sustainable Development Goals (SDGs) of the United Nations Development Programme both entail substantial global investments through cost-efficient, long-term financing. Noted for their risk-alleviating features and appeal to institutional and socially responsible investors, green bonds are gaining prominence in climate change and sustainable development finance frameworks. This study is the first to thoroughly examine publicly reported green bond proceeds allocations from 53 organizations to projects and assets throughout 96 countries from 2008 to 2017. Green bond markets are growing rapidly, and yearly proceeds allocation trends reveal increasing disbursements to renewable energy, clean water, low-carbon transportation, and other Paris Agreement and SDG-related investment categories. Circle plot analysis reveals unique allocation trends to specific green sectors at both regional and national levels. International finance institutions allocated the largest share of proceeds by both frequency and volume, and the projects and assets financed with green bonds in this study sample are associated with over 108 million tonnes of carbon dioxide equivalent (tCO₂e) in greenhouse gas emissions reductions and over 1500 gigawatts in renewable energy capacity. The study concludes with suggestions for improving green bond post-issuance reporting and provides insights for future green bond applications in expanding Paris and SDG agendas.

DOI： 10.1088/1748-9326/ab1118

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3934/GF.2019.2.139

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/su11051370

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.enpol.2018.08.055

記述言語：英語  

記述言語：英語  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jclepro.2017.12.154

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Determinants of foreign direct investment in wind energy in developing countries
The renewable energy industry is one of the fastest growing industries attracting a great amount of foreign direct investment, being one of the top 5 industries in 2015 in terms of the amount of investment allocated. However, the allocation of foreign direct investment in the sector greatly varies between developing countries. Preceding studies have tried to explain the location determinants of foreign direct investment mainly by looking at the effects of institutional and macroeconomic factors. The renewable energy sector has been supported by various economic, regulatory, and political support policies. Considering the importance of these support policies, the paper analyses their effects on foreign direct investment as location determinants in comparison with that of the widely accepted determinants (institutional and macroeconomic determinants), focusing on wind energy in developing countries. The results show that renewable energy support policies have equivalent or greater effect compared to the widely accepted determinants such as corruption level, price stability, access to finance, and GDP growth. The paper demonstrates the importance of analysing determinants of foreign direct investment focusing on a specific sector rather than looking at overall foreign direct investment. The paper also provides important policy implications including the need to improve the regulatory aspect of renewable energy sector such as access to grid infrastructure in order to attract foreign direct investment into the sector.

DOI： 10.1016/j.jclepro.2017.05.106

記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Renewable Energy in Pacific Small Island Developing States the role of international aid and the enabling environment from donor's perspectives
Dependency on fossil fuels is an issue for numerous countries, and in particular, it is an acutely challenging problem for Pacific Small Island Developing States. For the utilization of Renewable Energy in Pacific Small Island Developing States, donor agencies and international organizations play major roles in funding. This study introduces the nature of the past renewable energy projects in Pacific Small Island Developing States and, in the process, clarifies the contribution of international aid to renewable energy deployment. Thereafter, the paper identifies the most important factors related to enhancing an enabling environment for the introduction of Renewable Energy in Pacific Small Island Developing States and the relative importance of these factors with a special focus on donors’ perspectives. The paper clarifies that approximately 1.5 billion USD (2011) was received by Pacific Small Island Developing States over the 44 years from 1970 to 2014 as funding for renewable energy projects that included funding for hardware, and the amount of aid allocated for renewable energy in the region greatly varies between countries. The paper also identifies the important factors that can enhance an enabling environment for the introduction of renewable energy and the relative importance of these factors. Some of the highlighted implications that can be made from the findings of the research are: (1) high renewable energy targets need to be supported by well-structured action plans; (2) there is a need for an effective regulatory body responsible for renewable energy; and (3) the financial aspects of utilities are of higher importance than technological aspects of utilities.

DOI： 10.1016/j.jclepro.2016.05.011

記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1088/1755-1315/505/1/012044

記述言語：その他   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.rser.2023.114037

リポジトリ公開URL： https://hdl.handle.net/2324/7182009

記述言語：その他   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/app14010410

記述言語：その他   掲載種別：研究論文（学術雑誌）  

Sustainability study provides a roadmap to a better future. The global community is seeking a way to protect the people and the environment while supporting our economic prosperity, embodied by the UN Sustainable Development Goals (SDGs). Regrettably, however, progress toward the sustainable future has lagged through the pandemic; worse, there are some early signs that governments are reducing financing toward reaching the SDGs in the post-COVID era. Today, researchers have access to an unprecedented amount of data in the field of sustainability, and data science may hold the key to changing this tide. We can urge immediate actions for the global community by objectively analyzing the environmental, social, and economic progress toward SDGs—to open a new way to a sustainable future. It is time for us, researchers and practitioners, to reinvigorate global strides toward a sustainable future through coordinated efforts to utilize data in analyzing every aspect of sustainability. What is particularly needed today is the quantitative analysis of global development based on the empirical development of sustainability theory and observation. With this approach—which we named sustainametrics—academics may be able to present a viable path to a sustainable future.

DOI： 10.3389/frsus.2023.1130622

リポジトリ公開URL： https://hdl.handle.net/2324/7182008

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s10894-023-00361-z

リポジトリ公開URL： https://hdl.handle.net/2324/7182007

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/csr.2524

リポジトリ公開URL： https://hdl.handle.net/2324/7182006

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.iatssr.2023.02.004

リポジトリ公開URL： https://hdl.handle.net/2324/7182005

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/su15043154

リポジトリ公開URL： https://hdl.handle.net/2324/7182003

記述言語：その他   掲載種別：研究論文（学術雑誌）  

DOI： 10.3389/frsus.2022.909239

リポジトリ公開URL： https://hdl.handle.net/2324/7161197

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s11625-022-01219-7

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.resconrec.2021.105924

リポジトリ公開URL： https://hdl.handle.net/2324/7182002

記述言語：英語  

記述言語：その他   掲載種別：研究論文（その他学術会議資料等）  

DOI： 10.1088/1755-1315/505/1/012044

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

本研究は，日本における小水力発電の普及に係る障壁と課題について，事業主体の視点から明らかとすることを目的とする。筆者らが小水力発電事業実施地域に入り込み行ってきた参与観察及び小水力発電事業者への聞き取り調査とアンケート，そして先行研究を基に，小水力発電の普及に係る障壁と課題を事業主体の視点から８つ特定し，大きく次の３つのカテゴリーに整理を行った：政治的要因カテゴリー，技術・インフラ的要因カテゴリー，事業主体形成・計画・資金調達要因カテゴリー。 小水力発電事業者へのアンケートを基に，特定された各要因の重要度を，階層化意思決定法を用いて分析し，各要因の重み付けを行った。再生可能エネルギー全般において障壁となっている系統連系の問題に加えて，小水力発電には多くの許認可手続きの課題，地域住民との関わり方を含めた事業主体の形成の重要性，長期を要する開発期間の短縮のための事業計画の重要性等が確認された。これらの課題を踏まえた事業主体の形成，資金調達，そして地域住民や各種ステークホルダーとの調整を行っていくことがこれからの小水力発電の普及において重要であると考察される。本研究は，事業主体の視点に焦点をあてることによって，小水力発電の普及に係る障壁と課題を詳細に明らかにしている。

DOI： 10.3775/jie.97.245

開催年月日： 2021年5月

記述言語：英語   会議種別：口頭発表（一般）  

国名：日本国  

開催年月日： 2021年1月

記述言語：英語   会議種別：口頭発表（一般）  

国名：日本国  

開催年月日： 2020年9月 - 2021年9月

記述言語：英語   会議種別：口頭発表（一般）  

国名：ドイツ連邦共和国  

開催年月日： 2020年5月

記述言語：英語   会議種別：口頭発表（一般）  

開催地：日本   国名：日本国  

開催年月日： 2020年3月

記述言語：英語  

国名：日本国  

開催年月日： 2024年3月

記述言語：日本語   会議種別：口頭発表（一般）  

開催地：九州大学   国名：日本国  

記述言語：その他  

DOI： 10.3389/frsus.2022.920955

記述言語：その他  

DOI： 10.3389/frsus.2022.920876

記述言語：その他  

DOI： 10.1088/2516-1083/ac34e9

記述言語：日本語  

記述言語：日本語  

DOI： 10.20790/easoc.2018.9_21