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   1652篇
  免费   97篇
管理学   87篇
民族学   4篇
人才学   1篇
人口学   161篇
丛书文集   2篇
理论方法论   206篇
综合类   7篇
社会学   1215篇
统计学   66篇
  2023年   39篇
  2022年   9篇
  2021年   8篇
  2020年   28篇
  2019年   37篇
  2018年   50篇
  2017年   67篇
  2016年   53篇
  2015年   49篇
  2014年   84篇
  2013年   882篇
  2012年   40篇
  2011年   59篇
  2010年   30篇
  2009年   27篇
  2008年   27篇
  2007年   23篇
  2006年   27篇
  2005年   23篇
  2004年   11篇
  2003年   10篇
  2002年   11篇
  2001年   13篇
  2000年   11篇
  1999年   6篇
  1998年   2篇
  1997年   5篇
  1996年   7篇
  1995年   2篇
  1994年   12篇
  1993年   9篇
  1992年   11篇
  1991年   13篇
  1990年   6篇
  1989年   4篇
  1988年   4篇
  1987年   4篇
  1986年   3篇
  1985年   2篇
  1984年   3篇
  1983年   2篇
  1981年   8篇
  1980年   5篇
  1979年   2篇
  1978年   3篇
  1977年   4篇
  1974年   3篇
  1973年   2篇
  1972年   2篇
  1970年   2篇
排序方式: 共有1749条查询结果,搜索用时 15 毫秒
1.
Presidential elections are often seen as referendums on the health of the economy; however, little evidence exists on the president's ability to influence gross domestic product (GDP). This study examines the effect of the incentive to be reelected and the resulting increase in presidential effort on GDP growth. Growth is found to rise in reelection years for first‐term presidents after 1932 and to fall in election years before 1932, when reelection was uncommon, and for second‐term presidents generally. This effect is largest for high‐quality presidents—who probably have the highest return to effort—and is spread across multiple sectors of the economy. (JEL D78, D72, E32, J24)  相似文献   
2.
3.
4.
In non-experimental research, data on the same population process may be collected simultaneously by more than one instrument. For example, in the present application, two sample surveys and a population birth registration system all collect observations on first births by age and year, while the two surveys additionally collect information on women’s education. To make maximum use of the three data sources, the survey data are pooled and the population data introduced as constraints in a logistic regression equation. Reductions in standard errors about the age and birth-cohort parameters of the regression equation in the order of three-quarters are obtained by introducing the population data as constraints. A halving of the standard errors about the education parameters is achieved by pooling observations from the larger survey dataset with those from the smaller survey. The percentage reduction in the standard errors through imposing population constraints is independent of the total survey sample size.  相似文献   
5.
6.
7.
8.
9.
10.
Group therapists for those with HIV Related Diseases are becoming the “professional” survivors of this world-wide epidemic. From their experiences we may learn a great deal more about the effects of multiple deaths on mental health care professionals. As therapists they are constantly eliciting and listening to the fears, hopes, agonies and terrors of those with this disease. They become the bereaved. Witnesses to the deaths of many of their group members, they struggle with a wide range of emotional responses while at the same time assisting surviving group members in their struggle to live with these deaths. Mourning reactions and countertransference phenomena are in abundance as these therapists grapple with these group processes. This article identifies and examines these therapists' responses by focusing on clinical illustrations drawn from their bi-weekly supervision sessions.  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