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Elsevier Science
Resources policy

Elsevier Science

0301-4207

Resources policy/Journal Resources policySCISSCIISSHPEIAHCI
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    The threshold effect of HDI on the relationship between financial development and oil revenues

    Salari, Taghi EbrahimiMeidani, Ali Akbar NajiKoshalshahi, Zeinab ShabaniAyask, Amir Abbas Ajori...
    10页
    查看更多>>摘要：This paper tried to study the threshold effect of the Human Development Index (HDI) on the relationship between oil revenues and financial development. For this purpose, the threshold regression model is used. In addition, the financial depth index was considered as a measure of financial development. Data were collected with annual frequency (1990-2018) from the most recent statistics published by the Central Bank, Statistics Center of Iran, and OPEC website. The results showed that oil revenues in Iran had a negative significant effect on financial development. This result is consistent with the resource curse phenomenon, despite the expectation of the protective role of oil in the economy of Iran. However, at high levels of human development (index value that is upper than threshold value), this negative impact was reduced. Therefore, promoting human development can be mentioned as a solution to compensate for the negative effect of oil revenues. In addition, the variables of production growth and capital inventory, as expected, had a positive significant effect on financial development.
      原文链接:
    • NSTL
    • Elsevier

    Itria Valley (Apulia, Italy): Comparison of limestones for the construction and restoration of "Trulli" roofing

    Merico, AntonioBellopede, RossanaFiorucci, AdrianoMarini, Paola...
    9页
    查看更多>>摘要：The high concentration and cultural relevance of dry-built constructions in a territory such as Itria Valley, in Apulia (southern Italy), which was designated a World Heritage Site by UNESCO in 1996, make such constructions especially valuable, and raise the matter of conservation through the accurate selection and treatment of natural stone materials. The original and traditional way of construction (more precisely, the roofing of trulli) relies on the use of flat stones, 'chiancarelle', which are commonly taken from local accumulations ('specchie') or quarried from shallow embankments. Recently, the trend has shifted towards the use of sawn stones, which are less expensive since they do not need to be shaped by artisans. The scope of this study is to compare the mechanical performance of chiancarelle and sawn stones, to find whether correlation trends can be found between the technological properties of such stones, and to assess whether ageing cycles can produce variations in the mechanical behaviour of sawn stones. Finally, the results obtained allow the identification of the tested material and its geological origin, as well as the correlation with mechanical and technological properties.
      原文链接:
    • NSTL
    • Elsevier

    Strategic planning of post-mining land uses: A semi-quantitative approach based on the SWOT analysis and IE matrix

    Amirshenava, SinaOsanloo, Morteza
    16页
    查看更多>>摘要：The suitable Post-Mining Land-Use (PMLU) selection is the main stage in mine reclamation planning. One of the main objectives of mine reclamation is to ensure the sustainability of PMLU. To achieve a sustainable PMLU, the suitability and vulnerability of the PMLU should be maximum and minimum, respectively. In this regard, in addition to mined land suitability assessment, it is necessary to identify the PMLU option's vulnerabilities and provide appropriate solutions to mitigate them, relying on the PMLU option's strengths and existing opportunities. The best technique for handling this problem is the SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis method. However, very few studies have been done on the SWOT analysis of PMLU alternatives, most of which are qualitative and only provide a SWOT matrix without defining strategies to assure the sustainable deployment of PMLU options. Based on the SWOT analysis and the IE (Internal-External) matrix, a novel strategic planning approach for post-mining land-uses is developed in this study. To this end, after forming the SWOT matrices, appropriate strategies are defined based on the strategic position of each PMLU option in the IE matrix. The proposed approach is verified in Iran's iron ore mines. For generating the SWOT matrices, in total, 43, 41, 48, and 48 items of strengths, weaknesses, opportunities, and threats were defined for 8 possible general PMLU options, respectively. By quantifying the internal and external strategic factors, the PMLU option of non-renewable energy achieved the best strategic position in the IE matrix. Then, based on the PMLU options' strategic position in the IE matrix, 32 strategies were defined for all 8 PMLU options. To avoid overlapping strategies, each strategy simultaneously addresses several strategic factors. This new generic approach makes choosing the sustainable PMLU option easier and gives a general vision for the mine reclamation project's success.
      原文链接:
    • NSTL
    • Elsevier

    Natural resources commodity prices volatility and economic uncertainty: Evaluating the role of oil and gas rents in COVID-19

    Liu, WenwenChen, Xue
    10页
    查看更多>>摘要：Indeed, natural resources are the most tradable goods across the globe and are responsible for running the industrial sector of each country. However, with the recent outbreak of Covid-19, the demand and supply chain of natural resources is greatly influence and causes economic recession, which needs to be addressed. The Covid-19 pandemic increases uncertainty in the global economic policy and natural resource commodity prices. Although the literature provides empirical outcomes in the pre-Covid-19 period, still the influence in the Covid-19 remained unexplored and needs further research. In this regard, the current study examined the US natural resources commodity price volatility and global economic uncertainty while utilizing the monthly dataset from November 01, 2007, to May 01, 2021. Using the wavelet power spectrum and wavelet coherence approaches, the empirical findings of the wavelet power spectrum reveal volatilities in the global economic policy uncertainty and crude oil price in the short run. In contrast, the oil rent, natural gas rents and total natural resources show long-run vulnerabilities. Additionally, the wavelet coherence unveils bidirectional causal association global economic policy uncertainty and other variables. However, the causal influence of global economic performance is found higher than the others. Besides, the crude oil prices and oil rents are associated with global economic policy uncertainty after the Covid-19 pandemic. These findings could have essential economic and energy implications for governors, policymakers, and researchers.
      原文链接:
    • NSTL
    • Elsevier

    Renewable energy resources, natural resources volatility and economic performance: Evidence from BRICS

    Wu, DiYang, YupingShi, YiXu, Meng...
    9页
    查看更多>>摘要：This study analyzed the nexus of natural resources volatility, carbon emissions, renewable energy resources, and economic performance in Brazil, Russia, India, China and South Africa over the period 1990-2020. For empirical investigation, the panel estimations are used which reveals that all these variables are stationary with mixed order of integration. While the Westerlund test confirms that these variables are cointegrated. Due to non normality behavior of the data, panel quantile regression is employed that demonstrate that renewable energy resources and carbon emissions are positively associated with the region's economic performance, whereas carbon emission is found a prominent factor of economic performance than renewable energy resources. Moreover, natural resources volatility is also a crucial factor of economic performance. The results asserted that natural gas rents and coal rents are positively associated with economic performance, while oil rents are insignificant. Moreover, the study found unidirectional causal nexus running from renewable energy to economic performance, and bidirectional causality between carbon emissions and economic performance, oil rents and economic performance, natural gas rents and economic performance. However, no causal association is evident in the coal rents and economic performance. Based on the empirical results, policy suggestions are also provided for sustainable economic performance.
      原文链接:
    • NSTL
    • Elsevier

    The multiplex network structure of global cobalt industry chain

    Shi, QingSun, XiaoqiXu, ManWang, Mengjiao...
    9页
    查看更多>>摘要：During the transition of energy system to clean energy, energy security challenges shift from crude oil to critical minerals such as cobalt. Understanding the global cobalt industry chain thus has become a new challenge in the coming era of clean energy. In this study, we construct a multiplex network model and analyze the multiplex structure features of the global cobalt industry chain, which are our main innovations. Results show that (1) trade complexity in upstream network is the lowest compared with middle-stream network and downstream network; (2) most economies only participate in one or two stages of cobalt industry chain, while a few economies participate in the whole chain and own the global influences; (3) Mainland of China, USA, Germany, United Kingdom, and Spain are the systemic importance nodes for the global cobalt industry chain. These results provide a knowledge base for future studies on the cascading failure of supply crisis in the multiplex network of the global cobalt industry chain.
      原文链接:
    • NSTL
    • Elsevier

    Health costs of environmental pollution faced by underground coal miners: Evidence from Balochistan, Pakistan

    Ayaz, MuhammadJehan, NoorNakonieczny, JoannaMentel, Urszula...
    10页
    查看更多>>摘要：There is plenty of research on the environmental effects of coal mining. However, the economic valuation of health costs is seldom addressed. To know this, we have estimated health costs faced by miners working in underground coal mines in Balochistan, Pakistan. To compare the cost of illness caused by coal mines' pollution, we took two samples, the control group and the treatment group. The treatment group consisted of 150 underground coal miners working in different mines. The control group consisted of randomly selected farmers, construction workers, and waiters (fifty each). The double-hurdle model was used to estimate the factors affecting miner' decision to visit doctors in the first tier, while the second tier estimated the costs incurred on the treatment. Results indicate that socioeconomic and demographic variables such as age, education level, age when work started, income or wage rate, frequency of illness, living condition, sources of safe drinking water, and nationality (whether Afghan or Pakistani) of the respondents have significant impacts on the decision of getting treatment, and costs of illness of coal mine workers. Environmental variables, including methane and carbon monoxide, elevate the health cost of coal miners. The cost of illness increases with the narrow size of the coal seam. It is concluded that the coal minerssuffer from different ailments (respiratory diseases, irritation of the body, gastrointestinal problems, musculoskeletal harms, and headache). Their costs of illness are much higher as compared to noncoal workers. Our work addresses coal mining from a cost perspective, which can significantly enhance the pay system by including user fees in the wages. Among the various possible policy interventions, motivational training for miners to use protective measures, improved living environment, provision of nearby health facilities, employing advanced mining methods, and agreeing on a standard procedure correlated to seam size for degasification may be considered critical policy recommendations.
      原文链接:
    • NSTL
    • Elsevier

    Optimal layout of underground coal mining with ground development or protection: A case study of Jining, China

    Han, JiazhengYang, KunLi, GenshengHu, Zhenqi...
    12页
    查看更多>>摘要：Coal is an essential raw material for the social development of coal-producing countries, especially in China. In the past, however, underground coal mining (UCM) has had a negative impact on urban, agricultural and ecological spaces caused by multiple separate plannings. Therefore, integrated planning of UCM and aboveground development or protection (ADP) need to be studied urgently. In this study, we proposed functional zones of UCM and ADP by spatiotemporal and technical optimization. Results indicated that (1) four functional zones in urban space were proposed to clarify the sequences of UCM and ADP, reduce occupied coal seams and increase construction land. (2) Three functional zones in agricultural space were proposed to clarify the degree and spatial distribution of farmland degradation to guide farmland protection and land reclamation. (3) Two functional zones were in ecological space proposed to optimize UCM layout to avoid mines closed, and balance UCM and ecological protection. (4) Two functional zones proposed in the central urban can realize the interval development of UCM and urban construction, and provide a safe geological basis for urban expansion. The results can coordinate UCM and ADP, and provide a case reference for the territorial spatial planning of coal resource-based cities.
      原文链接:
    • NSTL
    • Elsevier

    Evaluating natural gas supply security in China: An exhaustible resource market equilibrium model

    Wang, XiaolinQiu, YangyangChen, JunHu, Xiangping...
    18页
    查看更多>>摘要：The continuous growth of natural gas demand in China has brought about supply security from the insufficient supply of domestic resources and ever-increasing dependency on natural gas imports. A multi-agent game framework for supply security is proposed to investigate availability, accessibility, and affordability along natural gas industry and supply chain. In this framework, an exhaustible resource market equilibrium model based on mixed complementary programming (MCP) is developed, taking into account the dynamic depletion of the remaining recoverable reserves, to evaluate the gas supply security in China. The results indicate the supply security of China's natural gas is far from optimistic from 2020 to 2049, and the newly-increased recoverable reserves of 200 bcm/a are required to meet the expanding scale of the natural gas market. However, it will face supply risks with lower Reserve-Production ratios after 2030 and higher dependencies after 2040. Therefore, the equilibrium model is used to simulate for seeking feasible solutions to ensure the natural gas supply security from three aspects: market structure, discount rate, and resources tax. Several combinational strategies suitable for China's natural gas supply security are suggested according to the market structure, natural gas import, discount rate, and resources tax for building a more diversification system of natural gas supply, establishing an efficient allocation system of the natural gas market and setting up an effective strategic stockpile system of natural gas resources.
      原文链接:
    • NSTL
    • Elsevier

    Time-varying spillovers between trade policy uncertainty and precious metal markets: Evidence from China-US trade conflict

    Chen, JinyuHuang, YuxinRen, XiaohangQu, Jingxiao...
    8页
    查看更多>>摘要：Using a time-varying vector autoregressive (TVP-VAR) model combined with a spillover index, we study the dynamic spillovers between trade policy uncertainty (TPU) and precious metal markets during the Sino-US trade war. The results show obvious spillover effects between the Chinese TPU and American TPU and the precious metal markets, and the strength and direction of the spillover effects are time-varying and asymmetrical. The uncertainty of the Sino-US trade policy has a heterogeneous impact on the precious metal markets. American TPU dominates the markets, followed by Chinese TPU. In the face of trade war conflict, the spillover fluctuation of American TPU to Chinese TPU is very significant. In addition, in the face of trade policy uncertainty, gold and silver have strong self-adjustment abilities and stabilities, making them highly suitable for hedging investments. International investors and policymakers should consider the impacts of international trade policy uncertainty when conducting risk monitoring and building portfolios in precious metal markets.
      原文链接:
    • NSTL
    • Elsevier