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   3896篇
  免费   39篇
财政金融   230篇
工业经济   120篇
计划管理   985篇
经济学   835篇
综合类   9篇
运输经济   6篇
旅游经济   14篇
贸易经济   826篇
农业经济   26篇
经济概况   749篇
邮电经济   135篇
  2018年   28篇
  2017年   31篇
  2016年   38篇
  2015年   72篇
  2014年   215篇
  2013年   379篇
  2012年   177篇
  2011年   84篇
  2010年   113篇
  2009年   164篇
  2008年   81篇
  2007年   54篇
  2006年   162篇
  2005年   118篇
  2004年   59篇
  2003年   54篇
  2002年   47篇
  2001年   45篇
  1992年   42篇
  1991年   41篇
  1990年   46篇
  1989年   45篇
  1988年   27篇
  1987年   28篇
  1986年   39篇
  1985年   32篇
  1984年   48篇
  1983年   31篇
  1982年   42篇
  1981年   45篇
  1980年   45篇
  1979年   49篇
  1978年   50篇
  1977年   61篇
  1976年   45篇
  1975年   33篇
  1974年   41篇
  1973年   34篇
  1972年   68篇
  1971年   60篇
  1970年   40篇
  1967年   33篇
  1966年   27篇
  1965年   27篇
  1963年   40篇
  1961年   27篇
  1960年   30篇
  1959年   28篇
  1958年   27篇
  1939年   26篇
排序方式: 共有3935条查询结果,搜索用时 312 毫秒
1.
2.
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   
3.
4.
5.
Within the context of a linear Leontief model, the LeChatelier-Samuelson principle examines the effects of an increase in some final demand on the output levels under the constraint that the production of certain goods is held at its original value. The principle states that the increase in any output is larger when fewer output levels are kept constant. The present paper discusses bounds for such incremental changes, second-order effects, the consequences on the markets for the products with restricted output levels, and generalizations of the original assumptions.I would like to thank two anonymous referees for their helpful comments.  相似文献   
6.
Rudy Moenaert, William Souder, Arnoud De Meyer, and Dirk Deschoolmeester report the results of their study of forty technologically innovative Belgian companies to examine the interaction between marketing and R&D. They studied one commercially successful and one commercially unsuccessful technological product innovation project in each participating company and collected data from one marketing and one R&D respondent per project. Communication flows between marketing and R&D are increased under conditions involving formalization of projects, decentralization, positive interfunctional climate, and role flexibility.  相似文献   
7.
Summary The problem considered in this paper is a generalization of the usual Rao, Hartley and Cochran (RHC) scheme. In the usual RHC scheme the population ofN units is randomly divided inton groups wheren is the size of the sample. In this paper we propose to divide the population under consideration into (n+k) random groups wherek is some positive integer. Then a sample ofn groups is selected by using simple random sampling without replacement (SRSWOR). The expressions for the unbiased estimator of population total, its variance and the unbiased estimate of variance have been obtained under the proposed sheme. The condition under which the proposed sheme is more efficient than the usual RHC scheme has also been investigated.  相似文献   
8.
Dr. M. Riedel 《Metrika》1992,39(1):209-217
Summary In this note we characterize all linear transformations of random vectors which are invariant for a given parametric covariance family. Two one-dimensional covariance families are discussed in detail.  相似文献   
9.
10.
It is often claimed that (i) managers work too hard on operational issues and do not spend enough effort on strategic activities, and (ii) something can be done about this by introducing nonfinancial performance measures, as for instance with a balanced scorecard. We give an explanation for both claims in a formal model. The distortion toward operational effort arises because with financial performance measures strategic effort can only be rewarded in the future. But renegotiation-proof long-term compensation plans entail too weak variable components in the future. This problem can be reduced by introducing performance measures that help to disentangle strategic and operational effects.  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