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61.
城市经济发展离不开能源消费,而能源消费直接导致大量的碳排放,深入研究碳排放与经济增长之间关系对超大城市实施节能减排、发展低碳经济具有重要意义。本文分别选取了上海市、北京市、天津市和重庆市1995~2014年碳排放和经济增长的相关数据,对两者的脱钩关系和格兰杰因果关系进行实证研究,得出长期内实施碳减排政策不会阻碍超大城市经济增长的结论。因此,超大城市应该积极推动低碳城市建设,不断推动产业结构升级,改善能源消费结构,积极实施节能减排政策和倡导低碳生活。 相似文献
62.
A restricted forecasting compatibility test for Vector Autoregressive Error Correction models is analyzed in this work. It is shown that a variance–covariance matrix associated with the restrictions can be used to cancel out model dynamics and interactions between restrictions. This allows us to interpret the joint compatibility test as a composition of the corresponding single restriction compatibility tests. These tests are useful for appreciating the contribution of each and every restriction to the joint compatibility between the whole set of restrictions and the unrestricted forecasts. An estimated process adjustment for the test is derived and the resulting feasible joint compatibility test turns out to have better performance than the original one. An empirical illustration of the usefulness of the proposed test makes use of Mexican macroeconomic data and the targets proposed by the Mexican Government for the year 2003. 相似文献
63.
Satwinder Singh A. Fattaah Mohamed Tamer Darwish 《International Journal of Human Resource Management》2013,24(19):3577-3598
Very little work in the past has focused on the comparative analysis of human resource management (HRM) practices between domestic and multinational enterprises (MNEs). The majority of the work in this area has instead concentrated on comparing the HRM practices utilised by the subsidiaries of MNEs, and has mostly been conducted in the context of developed countries. In this paper, we examine how the HR practices of appraisals, rewards and incentives are offered, explained and monitored in domestic enterprises (DEs) versus MNEs, and how they are similar or different in nature. This paper is based on primary data collected from a cross-section of firms operating in the country of Brunei Darussalam – a context within which no previous work of this nature has been undertaken. An analysis reveals several interesting results: HR practices are more advanced and better structured in MNEs that conduct performance appraisals (PA) more frequently than DEs, and their feedback system is also rapid; incentives and rewards systems in MNEs follow market ethos and principles; the HR directors and employees of MNEs are more receptive to PA than those in DEs whilst, in contrast to DEs, incentives and rewards systems in MNEs follow market ethos and principles. Furthermore, with regard to size, younger firms are more likely to be following market principles in terms of explaining incentives and rewards systems to their employees, whilst older firms claim that working for them carries social and psychological benefits for employees. 相似文献
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在系统分析都市圈形成过程中的社会经济要素及现代物流服务要素的演变基础上,结合当前都市圈现代物流发展的瓶颈性问题分析,分别从实施都市圈轴辐式共同配送模式、利用轨道交通网络形成多式配送体系、构建基于物联网技术的智能配送系统、发展专用物流车辆等方面提出了都市圈现代物流发展的对策。 相似文献
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68.
《Socio》2021
In the context of environmental sustainability evaluation, grouped under climate change, health and ecosystem themes, an impact that could be investigated is the Global Warming Potential (GWP), whose sources are a multitude. In urban areas the evaluation of real vehicles emissions is an essential activity in order to suggest possible solution to local administrators. They still express the need to improve and maintain the characteristics of the breathing air at the best possible quality level. Moreover, these solutions, such as planning measures or traffic control management in respect of pollution, would be apply at different geographical levels, i.e. national, regional or urban scale. Another factor to be investigated is the effect of technologies and emission control systems to comply more stringent limits (Euro 4/5/6) and improve air quality to a lower environmental impact. GWP, indicator of climate change, is measured in terms of CO2 equivalency emission values variable. To perform this activity an experimental campaign was carried out with several vehicles from different manufacturers and with a wide variety in terms of mass, power, engine displacement and type approval technology. The experimental plan includes some repetitions of the urban section in Naples city centre.The purpose of this paper is twofold: first, to provide a strategy on the choice of a logistic model with ordinal data and with trend, and, second, to evaluate the usefulness of such models for environmental sustainability (CO2 and other vehicular pollutant emissions), with particular emphasis on model formulation, the interpretation of model coefficients, and the implications of such models. 相似文献
69.
In this paper, we study the cryptocurrency pricing factors. We review the literatures which state that the cryptocurrency market is weakly efficient. We use the Fama–MacBeth method to investigate the pricing factors. The classical equity-based risk factors including size, momentum, and value to growth from the Fama–French three factor model are studied. We use crypto-unique coin-to-token as a proxy for value-to-growth. For volatility risk factor category, we investigate realized volatility, skewness and jump. We also investigate liquidity factors including bid–ask, volume growth and Roll’s measure. The macro factors are found not to be an explanatory factor. The attention factor works sometimes. The factor model constructed by the significant factors explain most of the excess return of cryptocurrencies. 相似文献
70.
秦永萍 《中小企业管理与科技》2021,(7)
由于国内社会经济的飞速发展,人民群众的生活水平越来越高,使得近年来出行旅游的人越来越多,这在很大程度上促进了旅游业的发展。特别是国内各地乡村旅游业的快速发展,大大推动了乡村经济的繁荣,促进了乡村现代化发展。论文以桂北地区乡土文化资源为研究对象,认为在发展乡村旅游经济的同时,更要重视乡土文化资源的保护与传承,从而有效实现乡村旅游经济的可持续发展,促进乡村旅游业以及社会经济的健康发展。 相似文献