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   137195篇
  免费   3182篇
  国内免费   2篇
财政金融   25765篇
工业经济   11589篇
计划管理   21706篇
经济学   29332篇
综合类   1465篇
运输经济   957篇
旅游经济   2482篇
贸易经济   23563篇
农业经济   6140篇
经济概况   17132篇
信息产业经济   8篇
邮电经济   240篇
  2021年   832篇
  2020年   1611篇
  2019年   2381篇
  2018年   2370篇
  2017年   2536篇
  2016年   2727篇
  2015年   2075篇
  2014年   3386篇
  2013年   15223篇
  2012年   4199篇
  2011年   4215篇
  2010年   3749篇
  2009年   4336篇
  2008年   3934篇
  2007年   3279篇
  2006年   3577篇
  2005年   3573篇
  2004年   3127篇
  2003年   2897篇
  2002年   2869篇
  2001年   2624篇
  2000年   2569篇
  1999年   2466篇
  1998年   2297篇
  1997年   2357篇
  1996年   2230篇
  1995年   2017篇
  1994年   2032篇
  1993年   2027篇
  1992年   2078篇
  1991年   1965篇
  1990年   1835篇
  1989年   1683篇
  1988年   1626篇
  1987年   1627篇
  1986年   1722篇
  1985年   2479篇
  1984年   2335篇
  1983年   2140篇
  1982年   2003篇
  1981年   1933篇
  1980年   1917篇
  1979年   1832篇
  1978年   1654篇
  1977年   1637篇
  1976年   1389篇
  1975年   1285篇
  1974年   1188篇
  1973年   1184篇
  1972年   900篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
951.
我的九条命     
在我生命中各个阶段里,我与学术界不知不觉地频频有缘。启蒙时期,我科到名师的熏导业已浸淫于国学;经史子籍,无所不读,撰文作诗,直追唐宋,俨然是一个“小老学究”。当我入仕时,一秉传统士大夫的志趋,一心为国为民,在我自我流放期间,发现我唯一可谋生的本领是学术,我既没有继承万贯家财,也没有在当权时放出许多人情,作为经商的捷径,实际上,我曾试探经商之路,但是在没有有力的后台引见下,我意识到,要加入一家企业,条件是能够为其带来多少商机,我对这种用才标准并不欣赏,在此情形下,要做一个小企业家,其生活方式也难以适应,特别是对我的妻女是一种冒险。  相似文献   
952.
We examine the effect of 269 cross‐border listings on rivals in the listing and domestic markets and find that U.S. rivals experience significant gains whereas domestic rivals do not. Both competitive and information effects are important in explaining the reaction of U.S. rivals. Regarding the competitive effects, the reaction of rivals is less favorable when listings originate in developed countries and more favorable when listing firms do not have prior operating presence in the United States. Regarding the information effects, the reaction is less favorable when listings are combined with equity offerings and more favorable when the listing is the first to occur within an industry.  相似文献   
953.
We investigate bank stocks'sensitivity to changes in interest rates and the factors affecting this sensitivity. We focus on whether the exposure of commercial banks to interest rate risk is conditioned on certain balance sheet and income statement ratios. We find a significantly negative relation between bank stock returns and changes in interest rates over the period 1991–1996. We also find that bank characteristics measured from basic financial statement information explain bank stocks'sensitivity to interest rate changes. These results suggest that bank managers, analysts, and regulators can use this information to assess the relative risk exposure of banks.  相似文献   
954.
This article attempts to bring coherence to the diversity that characterizes organizational learning research. It argues that organizational learning is embedded in four schools of thought: an economic school, a managerial school, a developmental school, and a process school. The article provides a comprehensive analysis of the schools, describes how they differ from each other, and outlines how each of them can be employed effectively. To demonstrate the benefits of theoretical plurality, the four schools are applied to the key marketing topics of market orientation and new product development. Implications for future research in marketing are provided. Simon J. Bell is a lecturer in marketing in the Faculty of Economics and Commerce at the University of Melbourne. Gregory J. Whitwell is an associate professor of marketing in the Faculty of Economics and Commerce at the University of Melbourne. Bryan A. Lukas is an associate professor of marketing and director of the Master of Applied Commerce Program in the Faculty of Economics and Commerce at the University of Melbourne.  相似文献   
955.
The integration of marketing and R&D is a major concern for companies that want to improve their new product performance (NPP). For this integration, companies are using mechanisms such as physical proximity, cross-functional teams, and job rotation. This study examines the effectiveness of these mechanisms by developing a model that distinguishes between indirect effects of mechanisms on NPP (i.e., through a higher level of integration) and direct effects. The model is tested with data collected from 148 pharmaceutical companies. We were able to measure and compare the effectiveness of seven different integration mechanisms, which produced insights that are interesting and relevant for theory as well as practice.
We found that housing marketing and R&D closer to each other and using an influential cross-functional phase review board are the most effective mechanisms to foster integration. Equal remuneration and career opportunities for marketing and R&D and cross-functional teams are somewhat less effective, whereas personnel movement and informal social group events contribute little. ICT appears to be a very effective tool for enhancing NPP. ICT not only fosters integration between marketing and R&D, but it also has an independent direct positive effect on NPP. Through ICT the day-to-day communication between the different parties in the companies becomes much easier, and we think that this fosters the knowledge creation process within marketing and R&D. For cross-functional phase review boards we found a negative direct effect on NPP. Notwithstanding its strong positive effect on integration, a price is paid in terms of NPP. This may be related to the amount of formalization and complexity accompanying this mechanism.  相似文献   
956.
This article describes a repeated game of multimarket contact, designed to be played throughout an entire term. Besides enjoying reciprocal advantages in their home markets, firms are perfectly informed after every round about each other's decisions. For most of the game, it appears there is always a future in which to punish deviations, and (with the game's parameters) zero-cost punishments can always be implemented. Thus the game provides all the elements for an escape from the prisoner's dilemma. Theoretical foundations, predictions, and some results are also discussed.  相似文献   
957.
Between 1974 and 1988, executives of DuPont, the world's largest producer of CFCs, were confronted with emerging evidence that CFCs were destroying the stratospheric ozone layer. The difficulty that executives face in such cases is that scientific knowledge develops over time and does not necessarily proceed in a straight line toward true conclusions. At the beginning of a new field of research, there is much uncertainty and disagreement among the experts. The solution of the ozone problem required a remarkable cooperation among science, business, and international governments. After looking at the role of DuPont executives in this drama, and the difficulties facing any executive dealing with uncertain science, the paper turns to an evaluation of the field of Business Ethics to see what light it might throw on this and analogous problems. Finally, the paper offers specific suggestions in terms of principles in dealing with uncertain science, and concludes that the course of action that DuPont followed, including some mistakes, can serve as a model for analogous crises.  相似文献   
958.
959.
H. Toutenburg  Shalabh 《Metrika》2002,54(3):247-259
This article considers a linear regression model with some missing observations on the response variable and presents two estimators of regression coefficients employing the approach of minimum risk estimation. Small disturbance asymptotic properties of these estimators along with the traditional unbiased estimator are analyzed and conditions, that are easy to check in practice, for the superiority of one estimator over the other are derived. Received May 2001  相似文献   
960.
Initial margin requirements represent: (1) a cost impediment to the wealth constrained investor and (2) a potential way of mitigating excessive volatility. However, prior empirical research finds that margins are not an effective tool in reducing volatility. We consider the possibility that margins primarily affect certain stocks and investors. Specifically, we test whether margins affect individuals who, as a group, we believe to be the investors most affected when margin requirements change. Our initial empirical tests, however, do not support this contention.  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