全文获取类型
收费全文 | 403篇 |
免费 | 20篇 |
专业分类
管理学 | 88篇 |
民族学 | 3篇 |
人才学 | 2篇 |
人口学 | 25篇 |
丛书文集 | 2篇 |
理论方法论 | 45篇 |
综合类 | 5篇 |
社会学 | 218篇 |
统计学 | 35篇 |
出版年
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 5篇 |
2018年 | 5篇 |
2017年 | 9篇 |
2016年 | 9篇 |
2015年 | 12篇 |
2014年 | 16篇 |
2013年 | 44篇 |
2012年 | 13篇 |
2011年 | 11篇 |
2010年 | 9篇 |
2009年 | 6篇 |
2008年 | 9篇 |
2007年 | 15篇 |
2006年 | 11篇 |
2005年 | 15篇 |
2004年 | 11篇 |
2003年 | 10篇 |
2002年 | 13篇 |
2001年 | 8篇 |
2000年 | 6篇 |
1999年 | 4篇 |
1998年 | 13篇 |
1997年 | 11篇 |
1996年 | 14篇 |
1995年 | 7篇 |
1994年 | 13篇 |
1993年 | 10篇 |
1992年 | 9篇 |
1991年 | 10篇 |
1990年 | 7篇 |
1989年 | 4篇 |
1988年 | 5篇 |
1987年 | 6篇 |
1986年 | 5篇 |
1985年 | 7篇 |
1984年 | 9篇 |
1983年 | 5篇 |
1982年 | 2篇 |
1981年 | 6篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 6篇 |
1977年 | 9篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1972年 | 2篇 |
排序方式: 共有423条查询结果,搜索用时 15 毫秒
81.
Using a multi-level discrete time hazard model, this study examines whether county level social structural characteristics affect the rate of family reunification, after adjusting for child attributes. Children who were placed in foster care for the first time during 2004 from 945 counties in 17 states are included. The county level characteristic examined included urbanicity, racial composition, percentage of female-headed households, proportion of households in poverty and foster care placement rate. The results show that with the exception of poverty, the other contextual variables affect family reunification, although the effects are most pronounced within the first six months of foster care placement. 相似文献
82.
83.
A Bayesian Model and Stochastic Exposure (Dose) Estimation for Relative Exposure Risk Comparison Involving Asbestos‐Containing Dropped Ceiling Panel Installation and Maintenance Tasks 下载免费PDF全文
Assessing exposures to hazards in order to characterize risk is at the core of occupational hygiene. Our study examined dropped ceiling systems commonly used in schools and commercial buildings and lay‐in ceiling panels that may have contained asbestos prior to the mid to late 1970s. However, most ceiling panels and tiles do not contain asbestos. Since asbestos risk relates to dose, we estimated the distribution of eight‐hour TWA concentrations and one‐year exposures (a one‐year dose equivalent) to asbestos fibers (asbestos f/cc‐years) for five groups of workers who may encounter dropped ceilings: specialists, generalists, maintenance workers, nonprofessional do‐it‐yourself (DIY) persons, and other tradespersons who are bystanders to ceiling work. Concentration data (asbestos f/cc) were obtained through two exposure assessment studies in the field and one chamber study. Bayesian and stochastic models were applied to estimate distributions of eight‐hour TWAs and annual exposures (dose). The eight‐hour TWAs for all work categories were below current and historic occupational exposure limits (OELs). Exposures to asbestos fibers from dropped ceiling work would be categorized as “highly controlled” for maintenance workers and “well controlled” for remaining work categories, according to the American Industrial Hygiene Association exposure control rating system. Annual exposures (dose) were found to be greatest for specialists, followed by maintenance workers, generalists, bystanders, and DIY. On a comparative basis, modeled dose and thus risk from dropped ceilings for all work categories were orders of magnitude lower than published exposures for other sources of banned friable asbestos‐containing building material commonly encountered in construction trades. 相似文献
84.
Wang Julia Shu-Huah Malaeb Bilal Ssewamala Fred M. Neilands Torsten B. Brooks-Gunn Jeannie 《Social indicators research》2021,158(3):947-990
Social Indicators Research - Using a randomized controlled trial design, we examine the effects of savings incentives (match rate 1:1 versus 1:2) with mentorship and financial trainings on child... 相似文献
85.
This paper presents Manufacturing Resource Planning, an information system that will enable the developing and monitoring of strategic plans. Incorporation proven material and capacity requirements planning techniques, strategic planners can determine readily the impact of their plans on the manufacturing resources of the company. Decision making is more coordinated because all managers work from a common data base. However, the attainment of this level of planning sophistication is costly not only in capital outlays for computer software and hardware but also in the time to train users. But those firms who have successfully incorporated this integrated approach to strategic planning feel strongly that the end results justify the expenditures. 相似文献
86.
We find strongly non-Ricardian results when we re-estimate Evans's [1988] model using a better approximation of the market value of wealth. We also examine the long-run properties of the data and find results consistent with our regression evidence when we allow for declining labor income as modeled by Gali (1990]. Our findings in support of non-Ricardian behavior by consumers stand in sharp contrast to those of both Evans and Gali. 相似文献
87.
Marudas Nicholas P. Jacobs Fred A. 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2004,15(2):157-179
We provide improved evidence on effects that fund-raising, government support, and program revenue of U.S. higher education, hospital, and scientific research nonprofit organizations (NPOs) have on donations to those NPOs and provide improved estimates of price elasticities of donations to, and donor demand for output of, those NPOs. Applying econometric tests, we find the best-specified model is two-way fixed effects, which controls for organization-specific and time-specific factors. Results suggest that U.S. higher education, hospital, and scientific research NPOs fund-raise to the point where the marginal fund-raising dollar brings in zero dollars of donations, donor demand for output of hospitals and scientific research NPOs is price inelastic and price elastic, respectively, and results are not sensitive to specification of price. 相似文献
88.
89.
In this investigation, the moral development of physically abused (N = 28), neglected (N = 26), and nonmaltreated (N = 28) five‐year‐old children from low socioeconomic backgrounds was examined through observational measures of prosocial behaviors, moral transgressions, and emotions associated with moral development. Findings showed that physically abused children engaged in more stealing behaviors, whereas neglected children engaged in significantly more cheating behavior and less rule‐compatible behavior compared to nonmaltreated children. In addition, maltreatment status differences interacted with gender on several of the moral paradigms. Physically abused girls displayed significantly less guilt and fewer donation behaviors than neglected girls. The clinical implications for maltreated children's moral development are discussed, and targeted interventions are suggested. 相似文献
90.
Fred W. Seymour David Epston 《Australian and New Zealand Journal of Family Therapy》1989,10(3):137-143
Childhood stealing is a distressing problem for families and may have wider community costs since childhood stealers often become adult criminals: This paper describes a therapeutic ‘map’ that emphasises direct engagement of the child, along with his/her family, in regrading the child from ‘stealer’ to ‘honest person’. Analysis of therapy with 45 children revealed a high level of family engagement and initial behaviour change. Furthermore, a follow-up telephone call made 6–12 months after completion of therapy sessions revealed that 81% of the children had not been stealing at all or had substantially reduced rates of stealing. 相似文献