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   14359篇
  免费   399篇
财政金融   3017篇
工业经济   1056篇
计划管理   2334篇
经济学   3155篇
综合类   153篇
运输经济   107篇
旅游经济   230篇
贸易经济   2304篇
农业经济   628篇
经济概况   1760篇
信息产业经济   2篇
邮电经济   12篇
  2023年   77篇
  2021年   91篇
  2020年   208篇
  2019年   275篇
  2018年   348篇
  2017年   362篇
  2016年   327篇
  2015年   216篇
  2014年   339篇
  2013年   1643篇
  2012年   398篇
  2011年   493篇
  2010年   450篇
  2009年   465篇
  2008年   418篇
  2007年   369篇
  2006年   340篇
  2005年   268篇
  2004年   277篇
  2003年   279篇
  2002年   277篇
  2001年   282篇
  2000年   297篇
  1999年   296篇
  1998年   302篇
  1997年   269篇
  1996年   225篇
  1995年   225篇
  1994年   236篇
  1993年   246篇
  1992年   265篇
  1991年   252篇
  1990年   200篇
  1989年   179篇
  1988年   154篇
  1987年   153篇
  1986年   158篇
  1985年   233篇
  1984年   249篇
  1983年   238篇
  1982年   209篇
  1981年   197篇
  1980年   165篇
  1979年   164篇
  1978年   153篇
  1977年   128篇
  1976年   123篇
  1975年   136篇
  1974年   98篇
  1973年   97篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
The purpose of this study is to investigate the relationship between return and yield in the context of ex ante data from The Value Line Investment Survey and by examining the role of dividends as a proxy for risk. The use of ex ante data should substantially reduce the confounding of tax and information effects that has affected earlier studies. Heteroscedasticity is detected in the after-tax CAPM and found to be negatively related to yield and positively related to beta. Maximum likelihood methods are used to correct for heteroscedasticity and generate efficient coefficient estimates. Using data for each of the years 1973 through 1983, there is an overall positive relationship between expected return and yield. However, coefficient estimates of yield are highly variable from year to year.  相似文献   
992.
Summary Attention for biases in the measurement of the Elasticity of Substitution (ES) in applied international trade flow modelling has a long tradition. It was mostly directed at the issue of the acceptability of the (often implicit) assumptions made on the parameters of the underlying demand model. The purpose of this paper is to prove both theoretically and with the help of some numerical examples that another strong potential source of biases in assessingES's in trade modelling does exist which gained remarkably little attention in the literature, namely, the regional pattern of international trade flows.  相似文献   
993.
994.
995.
Before a hospital considers creating an internal staffing agency, a detailed business plan must be developed. By addressing marketing and operational issues in advance, nurse executives can avoid unnecessary business problems.  相似文献   
996.
In this study, empirical tests are conducted to determine the impact of a sinking fund on reoffering yields of a sample of new public utility bonds sold between January 1977 and March 1982. The findings of the regression analysis are consistent with the hypotheses that the value of the sinking fund varies with the default risk of the issuer and with market expectations of future interest rate movements, and that the sinking fund improves the liquidity of a bond issue.  相似文献   
997.
This paper examines the consequences of a Stackelberg leader merging with followers when costs are convex. Such mergers are always profitable for the participants, and the followers often do better merging than remaining excluded rivals. This resolution of the merger paradox cannot be generated either by Stackelberg leadership without convex costs or by convex costs without leadership. In addition, with convex costs, a merger with the leader can actually harm excluded rivals (suggesting why they might object to the merger) and increase social welfare.  相似文献   
998.
999.
In order to test the Fuess and van den Berg [I9921 hypothesis on the influence of the increasing transactions sector's costs on the total factor productivity growth rate, the authors perform calculations and estimates of the Solow'S residual for both the total GNP and the non-transactions GNP on Italian data covering the period 1951-89. The results suggest that, as regards the Italian economy, the difference between total and non-transactions productivity growth rate (effect of institutions on material production), rather than having a constant positive sign, as in the findings of Fuess and van den Berg, alternates between negative and positive sign.  相似文献   
1000.
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