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   138174篇
  免费   3868篇
  国内免费   1篇
财政金融   26062篇
工业经济   11623篇
计划管理   22134篇
经济学   29930篇
综合类   1484篇
运输经济   959篇
旅游经济   2497篇
贸易经济   23726篇
农业经济   6162篇
经济概况   17201篇
信息产业经济   9篇
邮电经济   256篇
  2021年   838篇
  2020年   1637篇
  2019年   2398篇
  2018年   2434篇
  2017年   2583篇
  2016年   2746篇
  2015年   2101篇
  2014年   3417篇
  2013年   15337篇
  2012年   4265篇
  2011年   4270篇
  2010年   3777篇
  2009年   4390篇
  2008年   3967篇
  2007年   3320篇
  2006年   3596篇
  2005年   3597篇
  2004年   3140篇
  2003年   2919篇
  2002年   2850篇
  2001年   2720篇
  2000年   2630篇
  1999年   2514篇
  1998年   2385篇
  1997年   2416篇
  1996年   2287篇
  1995年   2078篇
  1994年   2062篇
  1993年   2037篇
  1992年   2104篇
  1991年   2023篇
  1990年   1894篇
  1989年   1712篇
  1988年   1655篇
  1987年   1666篇
  1986年   1733篇
  1985年   2490篇
  1984年   2376篇
  1983年   2182篇
  1982年   2027篇
  1981年   1973篇
  1980年   1928篇
  1979年   1861篇
  1978年   1657篇
  1977年   1631篇
  1976年   1396篇
  1975年   1281篇
  1974年   1189篇
  1973年   1186篇
  1972年   898篇
排序方式: 共有10000条查询结果,搜索用时 562 毫秒
181.
In this paper, we examine the warrant price and stock price reactions to the announcement of warrant life extensions by REITs. As predicted by option pricing theory, warrant prices increase in response to these extensions. The stocks of REITs making the extension announcements experience average abnormal returns that are not significantly different from zero. Thus, total firm value appears to increase, with the gains accruing primarily to the warrantholders.  相似文献   
182.
183.
Labour-market reforms in transition economies   总被引:1,自引:0,他引:1  
Several lessons can be drawn from the natural experiments ofcentral and eastern European countries with labour-market policies.Two of them are particularly relevant also for OECD countries.First, it is not wise to reduce the duration of unemploymentbenefits when the length of unemployment spells are on the rise,unless (I) unemployment is still low and there is the administrativecapacity to implement active labour-market policies on a widescale or (ii) there are income support schemes of the last resortin place and an administration capable of cost-effectively enforcingwork-tests for those falling off unemployment benefit compensationrolls. The second and perhaps more positive lesson in the lightof the above is that it is possible to transform institutionand create an efficient policy delivery mechanism within a shorttime span.  相似文献   
184.
R.Q. Doeswijk 《De Economist》1997,145(4):573-598
The efficient markets hypothesis states that at any times security prices fully reflect all available information. Contrarian investment strategies do not recognize the efficiency of capital markets. They call for buying undervalued stocks, i.e. stocks with a low price relative to their fundamentals. The idea behind such a strategy is to take advantage of the extrapolation behaviour of naive investors. Using a fresh and extensive data set from the Dutch stock market, we found that these strategies yield an outperformance without a higher risk. Our results make it hard to maintain the efficient market hypothesis.  相似文献   
185.
Asset market hangovers and economic growth: the OECD during 1984-93   总被引:1,自引:0,他引:1  
Asses prices and investment were unusually weak throughout theindustrial world during the early 1990s. This paper highlightsthis stylized fact, and connects it with another: in most ofthe industrial world, asset markets boomed for several yearsbefore collapsing around 1989. The paper suggests that assetmarket bubbles during the late 1980s may have left the industrialworld with an 'asset market hangover' in the early 1990s, inthe form of sluggish asset markets and investment. Empiricalsupport for this hypothesis is provided based on cross-countrydata for equity and real estate markets in most industrial countries.We suggest that financial market developments not justifiedby fundamentals can substantially affect real activity.  相似文献   
186.
187.
Abstract The research question in the present article can be phrased in the following way: what are the elements which influence the perception of the utility of information received from another function? A field study research has been conducted in 40 Belgian companies. In each company, we have studied two on-going innovation projects (one planning project, one development project). Crossfunctional communication behaviours at the R&D/marketing interface have been measured by means of mailed structured questionnaires. Three-hundred and eighty-six questionnaires have been returned. The data analyses show that there are four underlying information dimensions, i.e. the perceived relevance, the perceived comprehensibility, the perceived novelty and the perceived credibility of information. We also discuss some contingency variables (function of the message receiver, stage in the innovation process) that might moderate the impact of these dimensions. It will be shown that the interaction between source and receiver has a significant impact on the perceived credibility, the perceived comprehensibility and the perceived novelty of the received information.  相似文献   
188.
Negotiation support using the Graph Model for Conflict Resolution   总被引:1,自引:1,他引:0  
The Graph Model for Conflict Resolution is a flexible methodology for systematically studying strategic conflicts in the real world, and is therefore a natural tool for negotiation support. The basic definitions underlying the graph model are reviewed, and the techniques for analysis and interpretation are discussed. The modeling and analysis of a case study, an international trade negotiation concerning the export of Canadian softwood lumber to the United States, are used to demonstrate the practical application of the Graph Model for Conflict Resolution as a negotiation support tool. The modeling and analysis is carried out using the GMCR software system. The ability of the Graph Model for Conflict Resolution to provide insights and advice to negotiators is emphasized.  相似文献   
189.
190.
Consumers act out roles throughout their lives. Marketers assist in this role playing by providing the wardrobes, props, and sets in the form of products and services. They also help people understand acceptable role behavior by portraying roles in their communication programs. Consumers assume new roles as they age. This article is designed to enhance understanding of the often-ignored roles that accompany aging and provides examples of and suggestions for effective marketing for these role transitions.  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