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   98190篇
  免费   3063篇
  国内免费   4篇
管理学   13397篇
民族学   585篇
人才学   25篇
人口学   8104篇
丛书文集   542篇
教育普及   3篇
理论方法论   9882篇
现状及发展   1篇
综合类   2293篇
社会学   46904篇
统计学   19521篇
  2023年   543篇
  2021年   624篇
  2020年   1625篇
  2019年   2324篇
  2018年   2374篇
  2017年   3463篇
  2016年   2658篇
  2015年   2146篇
  2014年   2757篇
  2013年   19242篇
  2012年   2843篇
  2011年   2637篇
  2010年   2185篇
  2009年   2302篇
  2008年   2278篇
  2007年   2116篇
  2006年   2295篇
  2005年   2455篇
  2004年   2312篇
  2003年   2050篇
  2002年   2144篇
  2001年   2263篇
  2000年   2017篇
  1999年   1884篇
  1998年   1608篇
  1997年   1481篇
  1996年   1440篇
  1995年   1446篇
  1994年   1388篇
  1993年   1389篇
  1992年   1436篇
  1991年   1378篇
  1990年   1347篇
  1989年   1187篇
  1988年   1260篇
  1987年   1122篇
  1986年   1033篇
  1985年   1199篇
  1984年   1257篇
  1983年   1124篇
  1982年   1023篇
  1981年   915篇
  1980年   862篇
  1979年   961篇
  1978年   833篇
  1977年   754篇
  1976年   695篇
  1975年   673篇
  1974年   569篇
  1973年   481篇
排序方式: 共有10000条查询结果,搜索用时 912 毫秒
331.
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   
332.
333.
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   
334.
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   
335.
336.
337.
338.
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   
339.
This article examines whether asking the vote question beforeparty identification alters the strength of partisanship andits relationship to vote choice. It employs the 1992 BritishElection Survey, which included a random split half-sample experiment,and the 1992–93 American Election Study Panel, where thequestion order for party identification and the vote were changed.The results show that altering the question ordering had verylittle effect in Britain and no significant effect in the UnitedStates. These results are consistent with the notion that partyidentification is one of the more enduring and stable componentsof mass political behavior in both presidential and parliamentarysystems.  相似文献   
340.
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