全文获取类型
收费全文 | 2228篇 |
免费 | 65篇 |
国内免费 | 6篇 |
专业分类
财政金融 | 129篇 |
工业经济 | 433篇 |
计划管理 | 630篇 |
经济学 | 363篇 |
综合类 | 160篇 |
运输经济 | 21篇 |
旅游经济 | 13篇 |
贸易经济 | 168篇 |
农业经济 | 121篇 |
经济概况 | 261篇 |
出版年
2024年 | 9篇 |
2023年 | 22篇 |
2022年 | 36篇 |
2021年 | 66篇 |
2020年 | 63篇 |
2019年 | 33篇 |
2018年 | 29篇 |
2017年 | 69篇 |
2016年 | 40篇 |
2015年 | 75篇 |
2014年 | 332篇 |
2013年 | 191篇 |
2012年 | 181篇 |
2011年 | 259篇 |
2010年 | 222篇 |
2009年 | 163篇 |
2008年 | 147篇 |
2007年 | 83篇 |
2006年 | 62篇 |
2005年 | 61篇 |
2004年 | 30篇 |
2003年 | 29篇 |
2002年 | 30篇 |
2001年 | 6篇 |
2000年 | 21篇 |
1999年 | 13篇 |
1998年 | 9篇 |
1997年 | 5篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
排序方式: 共有2299条查询结果,搜索用时 15 毫秒
1.
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
2.
There has been an increase in price volatility in oil prices during and since the global financial crisis (GFC). This study investigates the Granger causality patterns in volatility spillovers between West Texas International (WTI) and Brent crude oil spot prices using daily data. We use Hafner and Herwartz’s (2006) test and employ a rolling sample approach to investigate the changes in the dynamics of volatility spillovers between WTI and Brent oil prices over time. Volatility spillovers from Brent to WTI prices are found to be more pronounced at the beginning of the analysis period, around the GFC, and more recently in 2020. Between 2015 and 2019, the direction of volatility spillovers runs unidirectionally from WTI to Brent oil prices. In 2020, however, a Granger-causal feedback relation between the volatility of WTI and Brent crude oil prices is again detected. This is due to the uncertainty surrounding how the COVID-19 pandemic will evolve and how long the economies and financial markets will be affected. In this uncertain environment, commodities markets participants could be reacting to prices and volatility signals on both WTI and Brent, leading to the detection of a feedback relation. 相似文献
3.
The UK gas industry has undergone major changes since it was privatised in 1986 as a fully integrated monopoly. The most significant of these has occurred not as a result of the privatisation legislation but by the intervention of the ordinary competition authorities in support of an active industry regulator. While price capping continues to be used as the primary instrument for welfare protection against the still substantial monopolistic powers of the incumbent, new competition (which has been positively encouraged) has had the greater impact on prices and choice. Recently, however, the regulator has encouraged the use of auctions for the sale of storage capacity. This paper considers the merits of auctions and makes a tentative evaluation of their effectiveness. Further use of auctions is recommended but reserve prices are considered inappropriate where monopoly power still remains. 相似文献
4.
The oil exporting countries have experienced a relatively continuous fall in GDP per capita over the last 30 years. This is in spite of benefiting from a more than average of the rest of the world investment rate. The findings of this paper, report a lower level of financial development for the oil economies when compared with the rest of the world. We will show in this paper that the higher rate of investment of the oil economies can be explained mainly by the oil revenues and surprisingly, financial development has a net dampening effect on investment for these economies. The paper also shows that the weakness of financial institutions, contributes to the poor performance of economic growth of the oil economies and the weakness of financial institutions might be associated with the dominant role of government in total investment and the weakness of private sector. 相似文献
5.
GONG Yan-fen PING Yu-lan 《美中经济评论(英文版)》2008,7(5):59-64
This article classified gas exploration risk on the basis of the characteristics of oil-gas exploration investment projects, which are internal systems risk and external non-systemic risk. It described each classification specifically and introduced the basic principles and mathematical model of the multi-factor hierarchical fuzzy comprehensive judgment in detail, and then researched the conducts the risk of the gas exploration with examples. 相似文献
6.
传统的消费观念和消费心理在目前资源和环境日益恶化的奈件下,已经难以为继。如何调整消费心理。进行合理消费已成为当前社会需要解决的重大课题。 相似文献
7.
8.
西气东输工程用感应加热弯管技术条件探讨 总被引:1,自引:0,他引:1
在对国外X70管线弯管技术条件进行调查分析与研究的基础上,对其中的几个关键技术问题包括母管成分,弯管的制造工艺和技术路线,强度与韧性要求,屈强比,Cu污染问题等进行了讨论。一些观点在西气东输感应加弯管技术条件中得到应用。 相似文献
9.
The Federal Energy Regulatory Commission's Order 636 fundamentally altered the regulatory and operational environment of the natural gas industry in 1992, as the culmination of several directives aimed at relaxing regulation and fostering competition. We hypothesize that gas pipeline firms subsequently changed their operational and financial behavior in ways consistent with reduced balkanization, increased competition, and reduced expense preference behavior. Our results indicate that these firms have become more homogeneous financially but less so operationally. We find evidence that the marginal profitability of various pipeline activities has responded more to financial market conditions than to the regulatory environment. 相似文献
10.
2005年的国际金融市场走势跌宕起伏,股票市场表现不一,债券市场基本上是区间波动走势,外汇市场美元一枝独秀,石油价格冲高回落而黄金的表现也引人注目。决定市场走势的因素是美国经济表现稳健,欧、日经济相形见绌,同时美国利率持续上升。2006年受房地产市场降温的影响,美国经济可能温和放缓,利率很快见顶,将对金融市场产生重大影响,总体而言风险加大。 相似文献