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   901篇
  免费   36篇
管理学   78篇
民族学   5篇
人口学   75篇
丛书文集   7篇
理论方法论   112篇
综合类   4篇
社会学   591篇
统计学   65篇
  2023年   7篇
  2022年   3篇
  2021年   5篇
  2020年   17篇
  2019年   26篇
  2018年   18篇
  2017年   49篇
  2016年   21篇
  2015年   21篇
  2014年   20篇
  2013年   187篇
  2012年   32篇
  2011年   28篇
  2010年   27篇
  2009年   24篇
  2008年   33篇
  2007年   33篇
  2006年   26篇
  2005年   22篇
  2004年   17篇
  2003年   19篇
  2002年   25篇
  2001年   24篇
  2000年   22篇
  1999年   20篇
  1998年   22篇
  1997年   16篇
  1996年   20篇
  1995年   15篇
  1994年   13篇
  1993年   11篇
  1992年   14篇
  1991年   2篇
  1990年   8篇
  1988年   8篇
  1987年   5篇
  1986年   7篇
  1985年   9篇
  1984年   14篇
  1983年   3篇
  1982年   8篇
  1981年   7篇
  1980年   5篇
  1979年   5篇
  1978年   2篇
  1977年   3篇
  1976年   3篇
  1974年   2篇
  1973年   2篇
  1967年   2篇
排序方式: 共有937条查询结果,搜索用时 47 毫秒
801.
This exploratory study has three objectives: (1) to understand the various ways academics, consultants, and practitioners conceptualize operating reserves; (2) to explore differences among academic findings, consultant recommendations, and nonprofit leader perceptions of operating reserves; and (3) to identify how practitioners operationalize operating reserves within their organizations. Using intensive interviews with nonprofit executives, we find that the operating reserve ratio (ORR) commonly used in the nonprofit literature does not accurately indicate whether an organization holds an operating reserve according to nonprofit leaders. In addition, results indicate that experienced nonprofit leaders perceive a variety of other fund types including endowment and investment savings as well as ability to borrow, other assets, sister foundations, and donor networks as legitimate substitutes for a reserve.  相似文献   
802.
Adolescents from low‐income families face various opportunities and constraints as they develop, with possible ramifications for their well‐being. Two contexts of particular importance are the home and the neighborhood. Using adolescent data from the first two waves of the Three‐City Study (= 1,169), this study explored associations among housing problems and neighborhood disorder with adolescents' socioemotional problems, and how these associations varied by parental monitoring and gender. Results of hierarchical linear models suggest that poor‐quality housing was most predictive of the functioning of girls and of adolescents with restrictive curfews, whereas neighborhood disorder was a stronger predictor for boys. Implications for future research on associations between housing and neighborhood contexts and adolescent development are discussed.  相似文献   
803.
When children and young people run away from home or care it is most often indicative of problems in their lives. Reporting on the findings of a recent evaluation, this study considers the role, delivery and impact of ‘return home welfare interviews’ (RHWIs) in identifying children and young people in need. It concludes that RHWIs function as an effective screening mechanism and can be facilitative in creating multiple pathways for referral to appropriate services. It challenges assumptions about the unsuitability of the police in undertaking RHWIs and highlights the importance of context, training and appropriate resourcing to the success of police delivery.  相似文献   
804.
Despite strong indications of elevated risk of suicidal behavior in lesbian, gay, bisexual, and transgender people, limited attention has been given to research, interventions or suicide prevention programs targeting these populations. This article is a culmination of a three-year effort by an expert panel to address the need for better understanding of suicidal behavior and suicide risk in sexual minority populations, and stimulate the development of needed prevention strategies, interventions and policy changes. This article summarizes existing research findings, and makes recommendations for addressing knowledge gaps and applying current knowledge to relevant areas of suicide prevention practice.  相似文献   
805.
Ethnic Enclaves and the Earnings of Immigrants   总被引:1,自引:0,他引:1  
Xie Y  Gough M 《Demography》2011,48(4):1293-1315
A large literature in sociology concerns the implications of immigrants’ participation in ethnic enclaves for their economic and social well-being. The “enclave thesis” speculates that immigrants benefit from working in ethnic enclaves. Previous research concerning the effects of enclave participation on immigrants’ economic outcomes has come to mixed conclusions as to whether enclave effects are positive or negative. In this article, we seek to extend and improve upon past work by formulating testable hypotheses based on the enclave thesis and testing them with data from the 2003 New Immigrant Survey (NIS), employing both residence-based and workplace-based measures of the ethnic enclave. We compare the economic outcomes of immigrants working in ethnic enclaves with those of immigrants working in the mainstream economy. Our research yields minimal support for the enclave thesis. Our results further indicate that for some immigrant groups, ethnic enclave participation actually has a negative effect on economic outcomes.  相似文献   
806.
807.
808.
809.
Drug developers are required to demonstrate substantial evidence of effectiveness through the conduct of adequate and well‐controlled (A&WC) studies to obtain marketing approval of their medicine. What constitutes A&WC is interpreted as the conduct of randomized controlled trials (RCTs). However, these trials are sometimes unfeasible because of their size, duration, and cost. One way to reduce sample size is to leverage information on the control through a prior. One consideration when forming data‐driven prior is the consistency of the external and the current data. It is essential to make this process less susceptible to choosing information that only helps improve the chances toward making an effectiveness claim. For this purpose, propensity score methods are employed for two reasons: (1) it gives the probability of a patient to be in the trial, and (2) it minimizes selection bias by pairing together treatment and control within the trial and control subjects in the external data that are similar in terms of their pretreatment characteristics. Two matching schemes based on propensity scores, estimated through generalized boosted methods, are applied to a real example with the objective of using external data to perform Bayesian augmented control in a trial where the allocation is disproportionate. The simulation results show that the data augmentation process prevents prior and data conflict and improves the precision of the estimator of the average treatment effect.  相似文献   
810.
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