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   26801篇
  免费   290篇
财政金融   4595篇
工业经济   1735篇
计划管理   4248篇
经济学   6092篇
综合类   597篇
运输经济   84篇
旅游经济   207篇
贸易经济   6206篇
农业经济   556篇
经济概况   2152篇
信息产业经济   45篇
邮电经济   574篇
  2023年   52篇
  2021年   48篇
  2020年   122篇
  2019年   158篇
  2018年   2436篇
  2017年   2222篇
  2016年   1383篇
  2015年   229篇
  2014年   291篇
  2013年   1411篇
  2012年   694篇
  2011年   2274篇
  2010年   2042篇
  2009年   1798篇
  2008年   1797篇
  2007年   2131篇
  2006年   386篇
  2005年   674篇
  2004年   728篇
  2003年   838篇
  2002年   544篇
  2001年   318篇
  2000年   272篇
  1999年   224篇
  1998年   248篇
  1997年   221篇
  1996年   212篇
  1995年   164篇
  1994年   155篇
  1993年   180篇
  1992年   159篇
  1991年   156篇
  1990年   131篇
  1989年   115篇
  1988年   116篇
  1987年   101篇
  1986年   132篇
  1985年   184篇
  1984年   198篇
  1983年   156篇
  1982年   160篇
  1981年   150篇
  1980年   157篇
  1979年   154篇
  1978年   107篇
  1977年   106篇
  1976年   98篇
  1975年   73篇
  1974年   99篇
  1973年   54篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
102.
We study possible rankings of opportunity profiles. An opportunity profile is a list of opportunity sets, one for each agent in the society. We compare profiles on the basis of the notion of “equality of opportunities”. Our main results show the necessary and sufficient conditions for this comparison to be made using exclusively the information provided by two cardinal measures: the number of common alternatives in all sets of a given profile and the difference between the number of alternatives in the individual sets. We also show that, under additional axioms, we can combine these criteria only in a weighted procedure or in some lexicographic refinements of a weighted procedure.   相似文献   
103.
104.
105.
106.
107.
Characterization and construction of optimal designs using the familiar optimality criteria, for example A-, D- and E-optimality are well studied in the literature. However the study of the Distance Optimality (DS-) criterion introduced by Sinha (1970) has very recently drawn attention of researchers. In the present article, we consider the singularly estimable full rank problem of estimating the full set of elementary treatment contrasts using the DS optimality criterion in the set up of a one way ANOVA model. Using a limit argument it turns out that a CRD in which difference between any two allocation numbers is at the most unity is uniquely DS-optimal. Acknowledgement. We are thankful to Prof. B. K. Sinha for suggesting the problem to us and many helpful discussions with him. We are also thankful to the referees for drawing our attention to the reference of Bischoff (1995) and many helpful comments.  相似文献   
108.
Using error-correction model (ECM) estimation, the paper empirically examines the causality relationship between the federal government budget deficit and the ex ante real interest rate yield on high grade long term tax free municipal bonds in the U.S. To clarify this deficit or interest rate relationship, the budget deficit is measured by the primary budget deficit, which excludes net interest payments by the Treasury. In a model that includes federal personal income tax rates and net international capital flows, as well as money supply growth, the ECM estimates strongly suggest a bi-directional relationship between the primary budget deficit and the ex ante real interest rate yield. Budget deficits apparently do matter! William Simon's concerns were justified.The author is indebted to P. A. V. B. Swamy for ideas and helpful suggestions and Will Perry for data assembly and processing.  相似文献   
109.
In 1983, the Greater London Council adopted a policy of 'Contract Compliance' designed to ensure that firms selling goods and services to the Council complied with its equal opportunity requirements. The initiative aroused wide interest and many other local authorities - 40 are known of to date - have been considering introducing such a policy. Although simple in essence, its execution can be complex and difficult. In April 1986, the Inner London Education Authority, a partner in the GLC policy, took over the Contract Compliance Unit following the GLCs abolition. Linda Smith explains the background to contract compliance, how the GLC, now ILEA, operates the policy; assesses its achievements and its significance and explores some of the lessons learnt in its three years of operation.  相似文献   
110.
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