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   138864篇
  免费   3862篇
  国内免费   1篇
财政金融   26158篇
工业经济   11661篇
计划管理   22288篇
经济学   30145篇
综合类   1494篇
运输经济   976篇
旅游经济   2503篇
贸易经济   23892篇
农业经济   6183篇
经济概况   17131篇
信息产业经济   7篇
邮电经济   289篇
  2021年   843篇
  2020年   1637篇
  2019年   2382篇
  2018年   2403篇
  2017年   2553篇
  2016年   2726篇
  2015年   2106篇
  2014年   3417篇
  2013年   15372篇
  2012年   4258篇
  2011年   4266篇
  2010年   3785篇
  2009年   4385篇
  2008年   3999篇
  2007年   3365篇
  2006年   3640篇
  2005年   3642篇
  2004年   3229篇
  2003年   2993篇
  2002年   2931篇
  2001年   2727篇
  2000年   2653篇
  1999年   2509篇
  1998年   2394篇
  1997年   2395篇
  1996年   2275篇
  1995年   2076篇
  1994年   2100篇
  1993年   2074篇
  1992年   2114篇
  1991年   2027篇
  1990年   1897篇
  1989年   1724篇
  1988年   1656篇
  1987年   1662篇
  1986年   1749篇
  1985年   2514篇
  1984年   2402篇
  1983年   2209篇
  1982年   2063篇
  1981年   1980篇
  1980年   1953篇
  1979年   1880篇
  1978年   1682篇
  1977年   1639篇
  1976年   1395篇
  1975年   1297篇
  1974年   1192篇
  1973年   1192篇
  1972年   903篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
181.
In this paper we will analyze the relationship between the value and duration moments of a cash flow and movements in the yield curve. We will show that for changes in the yield curve which can be related to tn , the 1st order changes in the net present value of a cash flow are linearly dependent on the n + lth duration moments, and that the 2nd order changes are dependent on the sum of duration moments of order 2 n + 1 and 2 n + 2. We will use this relationship to tilt tracking portfolios so as to protect them against specific changes in the yield curve.  相似文献   
182.
Objections to the teaching of business ethics   总被引:1,自引:0,他引:1  
  相似文献   
183.
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   
184.
185.
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   
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.
Measurement distortion and missing contingencies in optimal contracts   总被引:3,自引:0,他引:3  
Summary Theory suggests that optimal contracts should include many contingencies to achieve optimal risk sharing. However, in practice, few contracts are as complex as theory suggests. This paper develops a model which is consistent with this observation. The lack of risk sharing results from the interplay of two factors. First, contingencies must be based on information produced by measurement systems, which may be manipulable. Second, when two parties to a contract meet, they often have incomplete information. The type of contract offered may reveal information about the party who proposes it. Different types of agents have different preferences over contingent contracts, because they have different abilities to manipulate the measurement system. These differences in preferences allow the parties to signal their types through the contracts they offer. Noncontingent contracts may be chosen in equilibrium because they are the only contracts which do not give any type an incentive to distort the measurement system and, hence, do not reveal information about the party proposing the contract.We have benefited from conversations with Oliver Hart, Rick Lambert, Michael Riordan and Jean Tirole and the comments of Michel Habib, Nick Yannelis and two anonymous referees. Financial support from the National Science Foundation under grants SES-8920048 and SES-8720589 is gratefully acknowledged.  相似文献   
190.
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