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China’s Belt and Road Initiative (BRI) developed a system of interaction with the member countries to uplift economic and environmental integration. Through BRI, these countries are now developing in the field of financial management, energy and environment. This raised the importance to test nexus between energy, finance and environment-related constructs to present the empirical significance with policy suggestions. Therefore, considering the SDG number 7 for sustainable and reliable energy system, recent investigation attempted to determine that how green financing raise energy efficiency, and, to what extent economic and environmental integration act as a catalyst to enhance sustainability and reliability in energy systems of BRI member countries. For empirical analysis, study used the data from 2005–2018. The results have shown a significant variation in energy financing patterns, renewable energy sources consumption and carbon emission trends in BRI member nations. Moreover, the Probit regression analysis confirmed this variation between energy efficiency, financing patterns and carbon emission. Moreover, Human Development Index (HDI) and public financing in energy sector have shown a limited role in developing energy efficiency, which presented the room for private investment through green financing for energy efficiency maximization and this proved as significant in study context. This study also presented policy guidelines for key stakeholders.

Expansion of green bond markets as an appropriate way to lower environmental pollution is one of the most debatable issues among scholars. However, the expansion of this market is not a simple matter and depends on several factors. The main purpose of this study is to carry out a multi-dimensional analysis using the analytic hierarchy process (AHP) method to find and prioritize factors influencing the development of green bond markets. As a case, we do our analysis for Vietnam that, since the last years, has been trying to expand green bond market as an effective investment channel to finance low-carbon projects. The main findings revealed that legal infrastructure, official interest rate of green bonds, and economic stability are the most important factors directly affecting green bond market expansion. Therefore, economic and legal requirements should be addressed by policy makers. As major policy implications, we recommend an affordable price of green bonds and improvement of economic and financial stability to accelerate the development of green bond markets.

PurposeOne of the major negative effects of the Coronavirus outbreak worldwide has been reduced investment in green energy projects and energy efficiency. The main purpose of this paper is to study the role of green bond proposed by the World Bank in 2008, as a reliable instrument to enhance the capital flow in energy efficiency financing and to develop green energy resources during and post the current challenging global time.Design/methodology/approachWe model energy efficiency for 37 members of OECD through a panel data framework and quarterly data over 2007Q1–2020Q4.FindingsThe major results reveal the positive impacts of issued green bonds and regulatory quality index on energy efficiency, while any increase in inflation rate and urbanization decelerates the progress of raising energy efficiency.Practical implicationsAs highlighted concluding remarks and policy implications, it can be expressed that the tool of green bond is a potential policy to drive-up energy efficiency financing and enhancing environmental quality during and post-COVID period. It is recommended to follow green bond policy with an efficient regulation framework and urbanization saving energy planning.Originality/valueTo the best of the authors' knowledge, although a few scholars have investigated the impacts of COVID-19 on green financing or examined the energy efficiency financing, the matter of modeling energy efficiency–green bond relationship has not been addressed by any academic study. The contributions of this paper to the existing literature are: (1) it is the first academic study to discover the relationship between energy efficiency and green bond in OECD countries, (2) since our empirical part provides estimation results based on quarterly data covering the year of 2019 and 2020, it may offer some new policy implications to enhance energy efficiency financing in and post-COVID period, (3) furthermore, we consider energy efficiency indicator (mix of industrial, residential, services and transport energy efficiency) as the dependent variable instead of using the simple energy intensity variable as a proxy for energy efficiency.

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