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   91249篇
  免费   2952篇
  国内免费   3篇
管理学   12369篇
民族学   559篇
人才学   26篇
人口学   7173篇
丛书文集   528篇
教育普及   2篇
理论方法论   9442篇
现状及发展   1篇
综合类   2178篇
社会学   43033篇
统计学   18893篇
  2023年   507篇
  2021年   568篇
  2020年   1513篇
  2019年   2221篇
  2018年   2146篇
  2017年   3198篇
  2016年   2398篇
  2015年   2042篇
  2014年   2632篇
  2013年   18856篇
  2012年   2481篇
  2011年   2256篇
  2010年   2014篇
  2009年   2219篇
  2008年   2121篇
  2007年   1918篇
  2006年   2124篇
  2005年   2317篇
  2004年   2206篇
  2003年   1918篇
  2002年   2014篇
  2001年   2032篇
  2000年   1802篇
  1999年   1698篇
  1998年   1508篇
  1997年   1362篇
  1996年   1312篇
  1995年   1336篇
  1994年   1320篇
  1993年   1291篇
  1992年   1303篇
  1991年   1228篇
  1990年   1201篇
  1989年   1037篇
  1988年   1126篇
  1987年   1005篇
  1986年   911篇
  1985年   1078篇
  1984年   1135篇
  1983年   1017篇
  1982年   943篇
  1981年   862篇
  1980年   820篇
  1979年   867篇
  1978年   775篇
  1977年   711篇
  1976年   657篇
  1975年   638篇
  1974年   516篇
  1973年   440篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
We employ two population‐level experiments to accurately measure opposition to immigration before and after the economic crisis of 2008. Our design explicitly addresses social desirability bias, which is the tendency to give responses that are seen favorably by others and can lead to substantial underreporting of opposition to immigration. We find that overt opposition to immigration, expressed as support for a closed border, increases slightly after the crisis. However, once we account for social desirability bias, no significant increase remains. We conclude that the observed increase in anti‐immigration sentiment in the post‐crisis United States is attributable to greater expression of opposition rather than any underlying change in attitudes.  相似文献   
12.
13.
In this article, we propose a novel approach for testing the equality of two log-normal populations using a computational approach test (CAT) that does not require explicit knowledge of the sampling distribution of the test statistic. Simulation studies demonstrate that the proposed approach can perform hypothesis testing with satisfying actual size even at small sample sizes. Overall, it is superior to other existing methods. Also, a CAT is proposed for testing about reliability of two log-normal populations when the means are the same. Simulations show that the actual size of this new approach is close to nominal level and better than the score test. At the end, the proposed methods are illustrated using two examples.  相似文献   
14.
15.
16.
Feminist and empowerment theories are especially important to the understanding of individual and sociopolitical levels of social work assessment and intervention. Incorporating feminist and empowerment approaches in practice will provide social workers with the knowledge, values and skills most likely to promote human rights and social justice. In this paper, we present an overview of both theories and illustrate them with a case example.  相似文献   
17.
18.
Lifetime Data Analysis - Frailty models are generally used to model heterogeneity between the individuals. The distribution of the frailty variable is often assumed to be continuous. However, there...  相似文献   
19.
Abstract

The economic mobility of individuals and households is of fundamental interest. While many measures of economic mobility exist, reliance on transition matrices remains pervasive due to simplicity and ease of interpretation. However, estimation of transition matrices is complicated by the well-acknowledged problem of measurement error in self-reported and even administrative data. Existing methods of addressing measurement error are complex, rely on numerous strong assumptions, and often require data from more than two periods. In this article, we investigate what can be learned about economic mobility as measured via transition matrices while formally accounting for measurement error in a reasonably transparent manner. To do so, we develop a nonparametric partial identification approach to bound transition probabilities under various assumptions on the measurement error and mobility processes. This approach is applied to panel data from the United States to explore short-run mobility before and after the Great Recession.  相似文献   
20.
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