• Energy Research

Nigerian electricity market is characterized by inadequate electricity generation framework, compounded by lack of timely routine maintenances. This results in significant deterioration in plant electricity output. This study analyzes the productivity changes in the Nigerian power sector. Productivity increased on average in the power sector by the adoption of new technologies from best-practice power plants. The assumption of Hicks neutral technological change is found not to be suitable for the Nigerian power sector. This study finds that the plants are not using their capacity meaningfully, instead, there is a tendency to use labor.

Abstract It is important understanding urbanization where residents outside of the area come into the urbanized region. Urbanized area is the one facing more environmental problems because of intensive population density amplifying more damage to the environment. This paper targets China’s rapid urbanization and discusses research and policy needs in the field of sustainable urbanization. We discuss research needs for metabolism studies for sustainability of cities, major driving forces in the context of urbanization, and knowledge integration through stakeholder engagement.

Abstract Sustainable green technology is an important contributor to creating a sustainable society by simultaneously promoting environmental protection and economic development. This study examines the determinants of sustainable green technology invention in China, with a focus on the differences in green technology development priorities in each five-year plan period. This study uses patent publication data in a patent decomposition analysis framework. We find that sustainable green patent publications increased due to efficiency improvements, the prioritization of sustainable green patents, an increased R&D expenditure share and economic growth, especially during periods of gradual economic development in China. Additionally, we find that the relative priority of R&D shifted from renewable energy technology to pollution abatement and other sustainable green technology in the 12th five-year plan. The different R&D priority trends for sustainable green technologies among the five-year plans can be used to formulate effective policies that promote sustainable green technology invention.

Climate change and its impact on the agricultural sector in developing economies is a matter of considerable academic and political debate. This paper examines the impact of climate change and variability on Sri Lankan agriculture and identifies the potential adaptation practices and their impacts on rice productivity. More specifically, this study investigates how farming households’ decisions to adapt to climate change affects agricultural productivity in the Batticaloa district of Sri Lanka. The data were collected through a primary survey of 238 farming households. We employ a simultaneous equations model with endogenous switching to investigate the differing effects of adaptation on adapters and non-adapters. The findings show that most farmers perceive there are adverse climate change impacts on their agricultural production. We also find that farmers’ adaptation measures substantially boost rice yields. Moreover, it is shown that such strategies would benefit both adapters and non-adapters. Farmers’ access to climate related information, education, membership in farmer organizations and size of plots are found to play a key role in the adaptation process. Overall, this study provides empirical evidence of the positive impact of adaptations on food productivity and farm income, thus suggesting the need for policy interventions that enhance farmers uptake of strategies against climate change impacts.

AbstractThe argument that stringent environmental regulations are generally thought to harm export flows is crucial when determining policy recommendations related to environmental preservation and international competitiveness. By using bilateral trade data, we examine the relationships between trade flows and various environmental stringency indices. Previous studies have used energy intensity, abatement cost intensity, and survey indices for regulations as proxies for the strictness of environmental policy. However, they have overlooked the indirect effect of environmental regulations on trade flows. If the strong version of the Porter hypothesis is confirmed, we need to consider the effect of environmental regulation on gross domestic product (GDP), because GDP induced by environmental regulation affects trade flows. The present study clarifies the effects of regulation on trade flows by distinguishing between the indirect and direct effects. Our results indicate an observed non-negligible indirect effect of regulation, implying that the overall effect of appropriate regulation benefits trade flows.

Abstract Environmental protection technology plays an important role in a sustainable society, simultaneously promoting economic development and pollution control. This study examines the determinants of technology inventions related to environmental protection in Japan. We use patent application data in a decomposition analysis framework. We find that environmental patent applications increase according to the prioritization of environmental patents by private companies and according to efficiency improvements in patent applications in the public sector. Additionally, patent applications related to emission trading increased rapidly among private companies, mainly due to their increased priority after 2005. The different determinants of environmental technologies between the private and public sectors are useful for formulating effective policies to promote environmental innovation.

The Japanese electricity industry has experienced regulatory reforms since the mid-1990s. This article measures productivity in Japan's steam power-generation sector and examines the effect of reforms on the productivity of this industry over the period 1978-2003. We estimate the Luenberger productivity indicator, which is a generalization of the commonly used Malmquist productivity index, using a data envelopment analysis approach. Factors associated with productivity change are investigated through dynamic generalized method of moments (GMM) estimation of panel data. Our empirical analysis shows that the regulatory reforms have contributed to productivity growth in the steam power-generation sector in Japan.

Abstract This article examines the international crude oil trade and the international petroleum trade through econometric analysis and complex network analysis, focusing on the aspects of the driving forces and resistances for the oil trade and competitive or cooperative relationships among countries. The crude oil trade network and the petroleum trade network are constructed. Positional and role analysis reveals that countries can be divided into five positions in the crude oil trade network and twenty-five positions in the petroleum trade network. The relationships among countries within or between positions are discussed and recognized as competitive or cooperative. The bilateral oil trade analysis shows that various factors within countries have influence on bilateral trade volume. The analysis also implies that restrictions on trade partner selection due to geographical resistance forces neighboring oil-importing countries to choose similar oil-exporting countries, which corresponds with the results of the complex network analysis. The complex network analysis shows that the countries in the same position belong to the same region. Furthermore, the analysis results imply that the diversification in petroleum-exporting countries reduces the supply disruption risk for importing countries.