全文获取类型
收费全文 | 280篇 |
免费 | 9篇 |
专业分类
管理学 | 24篇 |
民族学 | 3篇 |
人口学 | 32篇 |
理论方法论 | 49篇 |
综合类 | 3篇 |
社会学 | 170篇 |
统计学 | 8篇 |
出版年
2024年 | 1篇 |
2023年 | 1篇 |
2021年 | 3篇 |
2020年 | 3篇 |
2019年 | 2篇 |
2018年 | 11篇 |
2017年 | 13篇 |
2016年 | 14篇 |
2015年 | 4篇 |
2014年 | 10篇 |
2013年 | 44篇 |
2012年 | 19篇 |
2011年 | 15篇 |
2010年 | 11篇 |
2009年 | 4篇 |
2008年 | 10篇 |
2007年 | 8篇 |
2006年 | 11篇 |
2005年 | 9篇 |
2004年 | 12篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 7篇 |
2000年 | 5篇 |
1999年 | 10篇 |
1998年 | 4篇 |
1997年 | 4篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 5篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 4篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有289条查询结果,搜索用时 375 毫秒
211.
Opportunity for Childcare: The Impact of Government Initiatives in England upon Childcare Provision 总被引:1,自引:0,他引:1
This paper considers the impact of recent government initiatives upon childcare provision for children under the age of five. It is based upon interviews with parents and providers from two contrasting wards in Liverpool. The aim of the research was to identify key issues and concerns with regard to childcare, and perceptions about the impact of developments within social security and education provision. Government policies have concentrated on supporting working parents who need to pay for formal childcare, and on providing an earlier start to the formal education of young children. There is a fear that this focus may be failing to recognize and support the diversity of families and their childcare needs. 相似文献
212.
213.
214.
This article focuses on data analyses under the scenario of missing at random within discrete-time Markov chain models. The naive method, nonlinear (NL) method, and Expectation-Maximization (EM) algorithm are discussed. We extend the NL method into a Bayesian framework, using an adjusted rejection algorithm to sample the posterior distribution, and estimating the transition probabilities with a Monte Carlo algorithm. We compare the Bayesian nonlinear (BNL) method with the naive method and the EM algorithm with various missing rates, and comprehensively evaluate estimators in terms of biases, variances, mean square errors, and coverage probabilities (CPs). Our simulation results show that the EM algorithm usually offers smallest variances but with poorest CP, while the BNL method has smaller variances and better/similar CP as compared to the naive method. When the missing rate is low (about 9%, MAR), the three methods are comparable. Whereas when the missing rate is high (about 25%, MAR), overall, the BNL method performs slightly but consistently better than the naive method regarding variances and CP. Data from a longitudinal study of stress level among caregivers of individuals with Alzheimer’s disease is used to illustrate these methods. 相似文献
215.
In an age of telemarketers, spam emails, and pop-up advertisements, sociologists are finding it increasingly difficult to achieve high response rates for their surveys. Compounding these issues, the current political and social climate has decreased many survey respondents’ likelihood of responding to controversial questions, which are often at the heart of much research in the discipline. Here we discuss such implications for survey research in sociology using: a content analysis of the prevalence of missing data and survey research methods in the most cited articles in top sociology journals, a case study highlighting the extraction of meaningful information through an example of potential mechanisms driving the non-random missing data patterns in the Religion Among Academic Scientists dataset, and qualitative responses from non-responders in this same case. Implications are likely to increase in importance given the ubiquitous nature of survey research, missing data, and privacy concerns in sociological research. 相似文献
216.
217.
Toto PE Raina KD Holm MB Schlenk EA Rubinstein EN Rogers JC 《Journal of aging and physical activity》2012,20(3):363-378
This single-group repeated-measures pilot study evaluated the effects of a 10-wk, multicomponent, best-practice exercise program on physical activity, performance of activities of daily living (ADLs), physical performance, and depression in community-dwelling older adults from low-income households (N = 15). Comparison of pretest and posttest scores using a one-tailed paired-samples t test showed improvement (p < .05) for 2 of 3 ADL domains on the Activity Measure-Post Acute Care and for 6 physical-performance measures of the Senior Fitness Test. Repeated-measures ANOVA revealed significant main effects for 3 of 8 physical activity measures using the Yale Physical Activity Scale. Retention rate was 78.9%, and the adherence rate for group sessions was 89.7%. Results suggest that participation in a multicomponent, best-practice physical activity program may positively affect sedentary, community-dwelling older adults' physical activity, ADL performance, and physical performance. 相似文献
218.
219.
220.
Using a multivariate framework, we analyze trends in employer provision of retiree health insurance (RHI), eligibility for
new retirees, and retiree contributions. Data come for the Medical Expenditure Panel Survey—Insurance Component (MEPS-IC).
While RHI provision to existing retirees decreased, eligibility for new retirees declined even more. Contribution requirements
increased between 2000 and 2006 for retirees not yet eligible for Medicare (less than 65 years of age), but remained stable
for those who were eligible (65 years of age or older). These results suggest growing financial instability for retirees. 相似文献