全文获取类型
收费全文 | 1383篇 |
免费 | 84篇 |
国内免费 | 4篇 |
专业分类
财政金融 | 47篇 |
工业经济 | 399篇 |
计划管理 | 469篇 |
经济学 | 160篇 |
综合类 | 62篇 |
运输经济 | 13篇 |
旅游经济 | 9篇 |
贸易经济 | 84篇 |
农业经济 | 107篇 |
经济概况 | 121篇 |
出版年
2024年 | 4篇 |
2023年 | 17篇 |
2022年 | 30篇 |
2021年 | 47篇 |
2020年 | 37篇 |
2019年 | 25篇 |
2018年 | 18篇 |
2017年 | 41篇 |
2016年 | 28篇 |
2015年 | 73篇 |
2014年 | 160篇 |
2013年 | 114篇 |
2012年 | 153篇 |
2011年 | 150篇 |
2010年 | 121篇 |
2009年 | 65篇 |
2008年 | 65篇 |
2007年 | 60篇 |
2006年 | 56篇 |
2005年 | 59篇 |
2004年 | 30篇 |
2003年 | 30篇 |
2002年 | 23篇 |
2001年 | 9篇 |
2000年 | 17篇 |
1999年 | 10篇 |
1998年 | 5篇 |
1997年 | 7篇 |
1996年 | 5篇 |
1995年 | 5篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
排序方式: 共有1471条查询结果,搜索用时 15 毫秒
1.
In the U.S., virtually no new coal-fired power plants have been built in recent years. Both industry experts and academics seem to believe that no rational firm will build a new coal-fired plant. Will such a trend continue in the future? To provide insights into this question, we investigate the optimal decision of an electricity company with an irreversible and deferrable opportunity to build either a new coal-fired or natural gas-fired power plant as its new base-load resource. According to our real option analysis, the optimal decision depends on the location. In the case of the eastern U.S., it is optimal to choose a natural gas plant if a firm is given a choice among a new natural gas plant, a new coal plant and deferring the investment. However, contrary to the common sentiment in the industry and academia, building a new coal plant in the western U.S. is still more economical than building a new natural gas plant in the absence of emission pricing. Furthermore, introducing carbon pricing to western U.S. states, as California did, can substantially increase the probability that a firm will optimally choose a natural gas plant over a coal plant. 相似文献
2.
Radovan Kastratovi 《The Australian journal of agricultural and resource economics》2019,63(3):620-642
This research analyses the impact of foreign direct investment on greenhouse gas emissions in the agriculture sector of developing countries. Panel data from 63 developing countries for the period 2005 to 2014 was used to estimate a dynamic econometric model by applying a system‐generalised method of moments. The empirical results indicate a positive impact of foreign direct investment in agriculture on the carbon dioxide equivalent emission intensity in developing countries. The results provide weak support for the pollution havens hypothesis and imply the importance of coordination between foreign direct investment and environmental policies. 相似文献
3.
4.
伴随着供应链管理的应用与发展,越来越多的企业认识到必须充分利用内外资源保持自身的竞争实力。作为重要的外部资源,供应商管理关系到企业成本与收益的平衡,而要做好供应端的成本管理首先要做好供应商的选择和优化。针对CS公司的供应商管理现状及存在的问题,探索适应企业的可操作性强的对策,以期为我国大型油气企业的供应商管理实践提供一定的参考。 相似文献
5.
民用气瓶也就是我们常说的液化气瓶,属于移动式高危产品,在人们日常生活中是必不可少的东西,因监管不完善导致每年发生的民用气瓶爆炸事件次数呈上升的状态,气瓶成了埋伏在我们周围的一个隐形“杀手”,严重威胁到人们的生命及财产安全,所以液化气市场需及时采取有效监管方案,彻底消除气瓶所带来的安全隐患。 相似文献
6.
ABSTRACTThe implications of national or regional energy policies for technical efficiency and environmental outcomes in electricity generation depend on fossil fuel input substitution. This study uses state level data to examine fossil fuel (coal and natural gas) substitution in electricity generation under increased availability of natural gas in the United States. We observe that changes in elasticities of substitution from pre-2009 to post-2009 differ across states suggesting that the effects of increased availability of inexpensive natural gas on electricity generation have been spatially heterogeneous. We rely on the observed heterogeneity to assess the effects of fossil fuel input substitution on technical efficiency and CO2 emissions. The results reveal that state level elasticity of substitution between natural gas and coal has a positive effect on technical efficiency and a negative effect on CO2 emissions. Therefore, future policy design and analyses should reflect the implications for regional elasticities of fossil fuel substitution and associated environmental outcomes. 相似文献
7.
Major climate-cum-energy policies and respective impact projections rest on the widespread belief that increased energy efficiency can be equated with savings in energy use and emissions. This belief is flawed. Due to the rebound effect emissions savings from energy efficiency improvements will be generally less than what is technically feasible, or even be reversed. By means of an analytical general equilibrium model we demonstrate the latter to be true in a case that is both stark and relevant: if electricity generation is subject to a cap-and-trade scheme with partial coverage, increased efficiency of electric devices leads unambiguously to increased carbon emissions. The result implies that a proper distinction between the energy rebound and the carbon rebound is warranted, and that public policy must carefully consider the interactions between energy efficiency promotion and carbon pricing. 相似文献
8.
Cássio G. Ribeiro Edmundo Inacio Junior Yanchao Li Andre Furtado Nanci Gardim 《Technology Analysis & Strategic Management》2020,32(2):119-132
ABSTRACTThis paper analyses the role of user-supplier relationships in the innovation dynamics of the Oil and Gas (O&G) industry, from an analysis supported by R&D and patent application data. This paper points to some recent interesting phenomena in the O&G sector, such as: (i) the remarkable advancement of two Chinese oil companies; (ii) the significant growth in O&G companies’ technological engagement in exploration and production (E&P) from the 2000s; (iii) the non-negligible increase in the application of O&G companies’ patents for renewable energy. Moreover, by working with the oil and gas chain complete, we show that the performance of the companies oil and gas equipment and services industry (O&GES) is restricted to the upstream activities. Finally, we bring up some arguments that have as objective relativise the typology of R&D intensity adopted by OECD. 相似文献
9.
李向前 《中小企业管理与科技》2021,(4)
2020年新冠疫情期间,部分燃气企业借助信息化系统优势,在落实防疫措施的同时,切实地保障了民生用气。论文阐述了燃气企业信息化系统的组成、在新冠疫情影响下展现的优势及小型燃气企业信息化推广面临的困难,强调了信息化建设对燃气企业管理水平、竞争能力提升的重要性。 相似文献
10.
Yujin Beak Kayoung Kim Kyuho Maeng Youngsang Cho 《Business Strategy and the Environment》2020,29(3):996-1006
In a bid to reduce greenhouse gas emissions, several countries worldwide are implementing policies to promote electric vehicles (EVs). However, contrary to expectations, the diffusion speed of EVs has been rather slow in South Korea. This study analyzes consumer preferences for the technological and environmental attributes of EVs and derives policy and environmental implications to promote market diffusion of EVs in South Korea. We conduct a choice‐based conjoint survey of 1,008 consumers in South Korea and estimate the consumer utility function using a mixed logit model considering consumer heterogeneity. Based on the consumer utility function, we analyze consumers' willingness‐to‐pay (WTP) for EV attributes such as driving range, charging method, charging time, autonomous driving function, carbon dioxide (CO2) reduction rate, and purchase price. The results indicate that the current low acceptance of EVs is due to their relatively high price and lack of a battery charging technology that satisfies consumers' expectations of the charging method and time. One interesting finding is that Korean consumers have a relatively higher WTP for the CO2 reduction rate of EVs than consumers in other countries; however, they do not consider CO2 reduction over other technological attributes when choosing EVs. This implies that the rate of CO2 reduction of EVs is not an important factor for South Korean consumers when buying EVs. We also calculate the effect of CO2 reduction with the market penetration of EVs and find that CO2 reduction through the diffusion of EVs depends on the country's electricity generation mix. 相似文献