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   89416篇
  免费   1958篇
  国内免费   3篇
管理学   12234篇
民族学   529篇
人才学   27篇
人口学   6664篇
丛书文集   510篇
理论方法论   9314篇
综合类   2085篇
社会学   41278篇
统计学   18736篇
  2023年   508篇
  2021年   563篇
  2020年   1511篇
  2019年   2203篇
  2018年   2026篇
  2017年   3123篇
  2016年   2330篇
  2015年   2045篇
  2014年   2626篇
  2013年   18881篇
  2012年   2291篇
  2011年   2053篇
  2010年   1925篇
  2009年   2152篇
  2008年   1988篇
  2007年   1786篇
  2006年   2046篇
  2005年   2224篇
  2004年   2139篇
  2003年   1841篇
  2002年   1950篇
  2001年   1905篇
  2000年   1695篇
  1999年   1624篇
  1998年   1467篇
  1997年   1323篇
  1996年   1275篇
  1995年   1307篇
  1994年   1280篇
  1993年   1257篇
  1992年   1226篇
  1991年   1158篇
  1990年   1142篇
  1989年   984篇
  1988年   1084篇
  1987年   954篇
  1986年   854篇
  1985年   1020篇
  1984年   1095篇
  1983年   984篇
  1982年   906篇
  1981年   844篇
  1980年   799篇
  1979年   850篇
  1978年   755篇
  1977年   675篇
  1976年   654篇
  1975年   629篇
  1974年   499篇
  1973年   425篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
191.
One hundred and sixty-four elite union leaders in the United States completed a survey to assess the condition of the American labor movement and the factors affecting it. The respondents included high-level international union and state federation officers, central labor presidents, and 58 shop stewards. This study compares the responses of these labor officials and finds that they have similar, negative assessments of the condition of the American labor movement. The study also finds that these leaders agree that the most important factors affecting the labor movement are collective bargaining rights, union leadership, union member solidarity, and the NLRB.  相似文献   
192.
193.
The more things change, the worse they get.Presented April 18, 1991, Duke University, at the Department of Psychiatry's Grand Rounds, this paper condenses, integrates and updates the author's earlier publication. Acknowledgement and thanks for funding and professional sponsorship of the four research studies this paper draws from are selectively due to the Eugene and Agnes E. Meyer Foundation, the Edgar Stern Family Fund, The National Institute for Mental Health, the Baltimore-Washington Institute for Psychoanalysis and the Department of Psychiatry, Children's Hospital National Medical Center.  相似文献   
194.
195.
Firms facing research costs and demand uncertainty may engage in second-sourcing, in which potential suppliers agree to pool production facilities. I show how sellers and buyers both can benefit from the practice. Second-sourcing allows firms to meet a wider range of possible rates of demand and often to supply a given rate of demand at a lower total cost than under non-cooperation. Buyers benefit through a reduced probability of stock-outs and frequently a lower purchase price. Semiconductor industry data are found to be consistent with the paper's predictions.  相似文献   
196.
This paper is concerned with how standard estimation procedures perform in terms of eficiency for non-normal rounded data. Previous research has shown that the loss in eficiency due to rounding normal data is small. However, evidence from the non-normal distribution considered in this paper suggests, if rounding is coarse or the distribution is very skewed the loss in efficiency due to rounding can be considerable.  相似文献   
197.
198.
199.
200.
A number of researchers have recently challenged the long-held notion among criminologists that rape, along with most other violent crimes, is an intraracial crime. Based on analysis of survey data they concluded that black rapists “prefer” or “seek out” white victims and that the likelihood of a black offender selecting a white victim has been increasing during recent years. Data presented here (1977–88 National Crime Surveys) refute the notion that black rapists “prefer” white victims. Moreover these same data fail to support the contention that rapes involving black offenders and white victims have been increasing. According to National Crime Survey estimates, the proportion of black offenders that victimize whites has been declining. An earlier version of this paper was presented at the annual meetings of the American Society of Criminology, November 1991.  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