Prof. Kentaka Aruga
Saitama University
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Academic Career Length
16Years (2011-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
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Journal Article
Just after the Indian government issued the first lockdown rule to cope with the increasing number of COVID-19 cases in March 2020, the energy consumption in India plummeted dramatically. However, as the lockdown relaxed, energy consumption started to recover. In this study, we investigated how COVID-19 cases affected Indian energy consumption during the COVID-19 crisis by testing if the lockdown release had a positive impact on energy consumption and if richer regions were quicker to recover their energy consumption to the level before the lockdown. Using the autoregressive distributed lag (ARDL) model, the study reveals that a long-run relationship holds between the COVID-19 cases and energy consumption and that the COVID-19 cases have a positive effect on Indian energy consumption. This result indicates that as lockdown relaxed, energy consumption started to recover. However, such a positive impact was not apparent in the Eastern and North-Eastern regions, which are the poorest regions among the five regions investigated in the study. This implies that poorer regions need special aid and policy to recover their economy from the damage suffered from the COVID-19 crisis.
1 November 2013 in Energy Policy
Journal Article
HWHiroki Wakamatsu
Hiroki Wakamatsu
Kentaka ArugaJournal Article
Honorata Nyga-ŁukaszewskaKentaka ArugaThe COVID-19 pandemic storm has struck the world economies and energy markets with extreme strength. The goal of our study is to assess how the pandemic has influenced oil and gas prices, using energy market reactions in the United States and Japan. To investigate the impact of the COVID-19 cases on the crude oil and natural gas markets, we applied the Auto-Regressive Distributive Lag (ARDL) approach to the number of the US and Japanese COVID-19 cases and energy prices. Our study period is from 21 January 2020 to 2 June 2020, and uses the latest data available at the time of model calibration and captures the so-called “first pandemic wave”. In the US, the COVID-19 pandemic had a statistically negative impact on the crude oil price while it positively affected the gas price. In Japan, this negative impact was only apparent in the crude oil market with a two-day lag. Possible explanations of the results may include differences in pandemic development in the US and Japan, and the diverse roles both countries have in energy markets.
1 June 2016 in Journal of Unconventional Oil and Gas Resources
Journal Article
Kentaka ArugaJournal Article
Kentaka ArugaAs mitigating the effects of energy consumption on the environment is a crucial issue for the Asia-Pacific region, this study investigates the energy-environmental Kuznets curve (EEKC) hypothesis among the 19 Asia-Pacific countries. The study also tests the EEKC hypothesis for the low-, middle-, and high-income groups of the region. The panel regression and cointegration models are used for this purpose. Our test results of both models suggest that the EEKC hypothesis holds for the whole Asia-Pacific region. However, the test performed on the three different income groups revealed that the hypothesis only holds for the high-income group. The hypothesis was not apparent for the low- and middle-income groups. This indicates that the transition in the energy consumption along the EEKC is only occurring in the developed countries of the Asia-Pacific region and the developed countries need to support the developing countries to achieve economic growth along the EEKC.
Journal Article
Md. Monirul Islam
Arifa JannatDRDewan Abdullah Al Rafi
Dewan Abdullah Al RafiKentaka ArugaThe present research analyzes the potential economic impact of the COVID-19 pandemic on South Asian economies using a systematic review approach. The cause-effect relationship framework showed that the outbreak of COVID-19 slowed down the gross domestic product (GDP) along with major economic sectors and indicators in the South Asian economies. The short and long-run predicted scenario showed that, compared to the agriculture sector, the service and manufacturing sectors will be affected more seriously in all South Asian countries. It was found that governments in the region are trying their best to adopt and implement expansionary fiscal strategies to combat this situation. Many countries have included farmers and allied workers in the government’s support system to utilize resources. In order to maintain the balance of international trade, the import and export of essential items must be given special support. To cope with this situation, governments can invest money from different autonomous institutions to expand Micro, Small, and Medium Enterprises (MSME). The findings of this research will be helpful for policy planners to formulate appropriate programs for short and long-run demands, along with economic and fiscal policies to sustain and revive the economic activity in South Asia.
About Me
Kentaka Aruga is a professor at the Graduate School of Humanities and Social Sciences, Saitama University. He received his Ph.D. in Environmental and Natural Resource Economics from the University of Rhode Island, where he developed expertise in applied econometrics, resource economics, and quantitative policy analysis. His research is characterized by rigorous empirical methods and strong policy relevance. Professor Aruga has authored a textbook on Environmental and Natural Resource Economics and has conducted extensive research on global commodity markets. Using time-series analysis, he has examined price dynamics, market integration, and volatility in commodities such as soybeans, rare metals, copper, and energy resources. His work explores how markets respond to macroeconomic shocks, financial activity, and structural shifts in global supply and demand. More recently, his research has focused on green finance and sustainable investment. He studies retail and institutional investors’ perceptions of green, sustainability, and blue bonds, aiming to clarify how financial markets can support the transition to a low-carbon economy. He also serves as an editor for Scientific Reports and Humanities and Social Sciences Communications, and as a Topic Advisory Panel Member for Sustainability, published by MDPI.