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   55526篇
  免费   850篇
  国内免费   2篇
财政金融   10219篇
工业经济   3611篇
计划管理   8612篇
经济学   12418篇
综合类   940篇
运输经济   324篇
旅游经济   679篇
贸易经济   10485篇
农业经济   1886篇
经济概况   6508篇
信息产业经济   47篇
邮电经济   649篇
  2023年   206篇
  2021年   246篇
  2020年   487篇
  2019年   747篇
  2018年   3037篇
  2017年   2840篇
  2016年   2061篇
  2015年   650篇
  2014年   1063篇
  2013年   4180篇
  2012年   1627篇
  2011年   3160篇
  2010年   2875篇
  2009年   2694篇
  2008年   2611篇
  2007年   2793篇
  2006年   1027篇
  2005年   1188篇
  2004年   1298篇
  2003年   1338篇
  2002年   1062篇
  2001年   839篇
  2000年   846篇
  1999年   763篇
  1998年   732篇
  1997年   708篇
  1996年   662篇
  1995年   592篇
  1994年   608篇
  1993年   636篇
  1992年   661篇
  1991年   644篇
  1990年   530篇
  1989年   474篇
  1988年   448篇
  1987年   456篇
  1986年   489篇
  1985年   698篇
  1984年   679篇
  1983年   649篇
  1982年   588篇
  1981年   527篇
  1980年   551篇
  1979年   490篇
  1978年   431篇
  1977年   398篇
  1976年   326篇
  1975年   370篇
  1974年   292篇
  1973年   286篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
The paper argues that although considerations such as industry consolidation, the role of lending and the effects of technology are still important in shaping the future of investment banking, sustainable competitive advantage necessitates that emphasis is also placed on thought leadership. This entails quite a radical change in terms of the way in which the industry approaches the problem of competition and requires emphasis on value creation for all the constituent parts of the industry: corporations, investors, the banks themselves and research departments. Accordingly, the paper provides a rationale for this change and provides inter alia a range of examples to illustrate how thought leadership could lead to a fundamental change in the future of the investment banking industry.  相似文献   
3.
A play-the-winner-type urn design with reduced variability   总被引:1,自引:0,他引:1  
We propose a new adaptive allocation rule, the drop-the-loser, that randomizes subjects in the course of a trial comparing treatments with dichotomous outcomes. The rule tends to assign more patients to better treatments with the same limiting proportion as the randomized play-the-winner rule. The new design has significantly less variable allocation proportion than the randomized play-the-winner rule. Decrease in variability translates into a gain in statistical power. For some values of success probabilities the drop-the-loser rule has a double advantage over conventional equal allocation in that it has better power and assigns more subjects to the better treatment. Acknowledgments. I thank Stephen Durham, the associate editor, and the referees for their helpful suggestions.  相似文献   
4.
5.
Previous work shows that establishments with higher proportions of women are more likely to use piece rates but that individual women are less likely to receive performance pay. We present a model in which lower expected tenure and labor force attachment are positively associated with piece rates but are negatively associated with other forms of performance pay. Analysis of the National Longitudinal Survey of Youth (NLSY) confirms that women are more likely to be paid piece rates and simultaneously less likely to be paid commissions and bonuses.  相似文献   
6.
7.
8.
本文介绍了网络预算管理是如何有效地克服传统预算方法的缺点,通过有效的控制去解决企业预算管理工作中的实际问题,指出了该预算方法能大大提高工作效率和管理效率。  相似文献   
9.
Construction kits have played a significant part in nurturing the growth and development of the minds and manipulation-based skills of children (and adults) in formal and non-formal education settings. These kits have origins rooted in the representation of the built world and now have a diversity of form and function, including technical versions with moving parts. This article examines some of the historically based ideas that lie behind the role that kits may have in terms of physical modelling. The article traces the transformation of kits from simple bricks and blocks into more complicated pieces for space-filling and achieving the transfer of forces and motion. This transformation occurred during the Victorian era when the influence of the ideas of educationalists and, perhaps rather strangely, exponents of early aviation, played major roles in determining the diversity of forms of construction kit and modelled possibilities that are now to be seen in classrooms and homes. The article ends with a review of some of the lessons from the past and present that will need to be considered in relation to concrete modelling in schools for the future. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
10.
Selecting the most promising candidates to fill an open position can be a difficult task when there are many applicants. Each applicant achieves certain performance levels in various categories and the resulting information can be overwhelming. We demonstrate how data envelopment analysis (DEA) can be used as a fair screening and sorting tool to support the candidate selection and decision-making process. Each applicant is viewed as an entity with multiple achievements. Without any a priori preference or information on the multiple achievements, DEA identifies the non-dominated solutions, which, in our case, represent the “best” candidates. A DEA-aided recruiting process was developed that (1) determines the performance levels of the “best” candidates relative to other applicants; (2) evaluates the degree of excellence of “best” candidates’ performance; (3) forms consistent tradeoff information on multiple recruiting criteria among search committee members, and, then, (4) clusters the applicants.  相似文献   
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