首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   34341篇
  免费   354篇
财政金融   5842篇
工业经济   2188篇
计划管理   5315篇
经济学   7634篇
综合类   675篇
运输经济   108篇
旅游经济   219篇
贸易经济   7316篇
农业经济   906篇
经济概况   3826篇
信息产业经济   47篇
邮电经济   619篇
  2021年   114篇
  2020年   198篇
  2019年   270篇
  2018年   2652篇
  2017年   2428篇
  2016年   1615篇
  2015年   340篇
  2014年   411篇
  2013年   1787篇
  2012年   916篇
  2011年   2470篇
  2010年   2224篇
  2009年   2014篇
  2008年   1964篇
  2007年   2267篇
  2006年   467篇
  2005年   789篇
  2004年   840篇
  2003年   985篇
  2002年   577篇
  2001年   418篇
  2000年   379篇
  1999年   324篇
  1998年   336篇
  1997年   315篇
  1996年   352篇
  1995年   304篇
  1994年   301篇
  1993年   251篇
  1992年   285篇
  1991年   294篇
  1990年   260篇
  1989年   225篇
  1988年   213篇
  1987年   176篇
  1986年   257篇
  1985年   326篇
  1984年   320篇
  1983年   295篇
  1982年   292篇
  1981年   276篇
  1980年   244篇
  1979年   253篇
  1978年   220篇
  1977年   197篇
  1976年   167篇
  1975年   158篇
  1974年   145篇
  1973年   118篇
  1972年   124篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
163.
164.
165.
166.
The general design for the real-time electricity market presented in this paper optimizes and prices both real and reactive power simultaneously in an AC setting, where all assets—generation, load and transmission—are allowed to bid and are financially settled at the locational price times energy consumed or produced. The result is that transmission lines are compensated for both capacity and admittance, providing incentives for efficient operation of transmission-related assets such as FACTS devices, if price-taking behavior is assumed. Losses are incorporated into the design and become an operating cost for transmission. The market design is shown to be revenue neutral and, under some assumptions, nonconfiscatory.   相似文献   
167.
Cross‐listings of equities internationally are becoming more common. Using data for Europe and North America, previous studies reject the order flow diversion hypothesis, which states that international cross‐listings reduce home‐country trading volume. We test this hypothesis using data for equities cross‐listed in Singapore and Malaysia. We find that trading volume in Malaysia fell 42.9% when Singapore markets were closed for holidays. Furthermore, we show that trading volume in Malaysia did not increase following the implementation of regulations that ended the trading of Malaysian equities in Singapore in 1998. Hence, we reject the order flow diversion hypothesis.  相似文献   
168.
The United States (US) exports more than US$6 billion in agricultural commodities to the European Union(EU) each year, but one issue carries the potential to diminish this trade: use of biotechnology in food production. The EU has adopted more stringent policies towards biotechnology than the US. Understanding differences in European and American policies towards genetically modified (GM) foods requires a greater understanding of consumers’ attitudes and preferences. This paper reports results from the first large‐scale, cross‐Atlantic study to analyse consumer demand for genetically modified food in a non‐hypothetical market environment. We strongly reject the frequent if convenient assumption in trade theory that consumer preferences are identical across countries: the median level of compensation demanded by English and French consumers to consume a GM food is found to be more than twice that in any of the US locations. Results have important implications for trade theory, which typically focuses on differences in specialization, comparative advantage and factor endowments across countries, and for on‐going trade disputes at the World Trade Organization.  相似文献   
169.
Approaches to child labour in the supply chain   总被引:3,自引:0,他引:3  
This paper examines the difficulties of dealing with child labour in the supply chain. It begins by identifying a number of the factors which make global supply chains so difficult to manage. It goes on to outline a framework of different approaches that can be taken to managing the supply chain with relation to child labour, moving from national and international regulation, through to the role of NGOs and the companies themselves. Focusing on an 'engagement' strategy for dealing with child labour, the paper traces a case study of Adidas-Salomon and its attempts to implement their 'standards of engagement' in this area with relation to one of their supplier factories in Vietnam. The research draws on the direct involvement of one of the authors who visited the site and was able to interview staff and observe the operation in practice. Her findings are supported by wider work on the implementation of corporate approaches to human rights at a range of companies interviewed by another of the authors. The paper aims to highlight the issues needing to be addressed for companies considering the 'involvement' approach to child labour. It also aims to develop theory on our understanding of different approaches to corporate rights.  相似文献   
170.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号