全文获取类型
收费全文 | 23052篇 |
免费 | 617篇 |
国内免费 | 3篇 |
专业分类
管理学 | 3177篇 |
民族学 | 128篇 |
人才学 | 6篇 |
人口学 | 2070篇 |
丛书文集 | 126篇 |
理论方法论 | 2123篇 |
综合类 | 339篇 |
社会学 | 11307篇 |
统计学 | 4396篇 |
出版年
2023年 | 117篇 |
2021年 | 128篇 |
2020年 | 335篇 |
2019年 | 502篇 |
2018年 | 652篇 |
2017年 | 864篇 |
2016年 | 615篇 |
2015年 | 474篇 |
2014年 | 582篇 |
2013年 | 4050篇 |
2012年 | 800篇 |
2011年 | 679篇 |
2010年 | 600篇 |
2009年 | 521篇 |
2008年 | 533篇 |
2007年 | 566篇 |
2006年 | 573篇 |
2005年 | 526篇 |
2004年 | 456篇 |
2003年 | 402篇 |
2002年 | 453篇 |
2001年 | 605篇 |
2000年 | 523篇 |
1999年 | 466篇 |
1998年 | 358篇 |
1997年 | 314篇 |
1996年 | 353篇 |
1995年 | 317篇 |
1994年 | 336篇 |
1993年 | 313篇 |
1992年 | 344篇 |
1991年 | 356篇 |
1990年 | 335篇 |
1989年 | 306篇 |
1988年 | 320篇 |
1987年 | 309篇 |
1986年 | 248篇 |
1985年 | 320篇 |
1984年 | 327篇 |
1983年 | 288篇 |
1982年 | 239篇 |
1981年 | 179篇 |
1980年 | 203篇 |
1979年 | 230篇 |
1978年 | 182篇 |
1977年 | 162篇 |
1976年 | 142篇 |
1975年 | 158篇 |
1974年 | 158篇 |
1973年 | 127篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
912.
Johann Fuchs Doris Söhnlein Brigitte Weber Enzo Weber 《Population research and policy review》2018,37(1):33-58
This paper presents a stochastic model to forecast the German population and labor supply until 2060. Within a cohort-component approach, our population forecast applies principal components analysis to birth, mortality, emigration, and immigration rates, which allows for the reduction of dimensionality and accounts for correlation of the rates. Labor force participation rates are estimated by means of an econometric time series approach. All time series are forecast by stochastic simulation using the bootstrap method. As our model also distinguishes between German and foreign nationals, different developments in fertility, migration, and labor participation could be predicted. The results show that even rising birth rates and high levels of immigration cannot break the basic demographic trend in the long run. An important finding from an endogenous modeling of emigration rates is that high net migration in the long run will be difficult to achieve. Our stochastic perspective suggests therefore a high probability of substantially decreasing the labor supply in Germany. 相似文献
913.
The existing literature on the determinants of income redistribution has identified a ‘paradox’. Namely, that countries with a high degree of market income inequality redistribute little, which is in disagreement with the median voter theorem. In a first step, this paper outlines several mechanisms that explain why government corruption might be partially responsible for this ‘paradox’. In a second step, different corruption perception indices and an instrumental variable approach are used to provide empirical evidence that indicates a significant negative impact of corruption on redistribution levels for a sample of 148 developing and developed countries. This finding suggests that, next to political and need factors, government corruption explains to some extent the ‘paradox of redistribution’. This is especially true for many developing countries, given that they typically have relatively high degrees of corruption and low levels of redistribution. 相似文献
914.
E. Scott Huebner 《Social indicators research》2018,135(3):1021-1025
Land and Michael’s (this issue) offer an excellent overview of the evolving status of the social indicators movement, with thoughtful recommendations for future research. I argue that QOL researchers may want to consider paying increased attention to advances in the science of personality development, such as those articulated in McAdams' (The art and science of personality development. Guilford Press, New York, 2015), in conceptualizing comprehensive assessments of the QOL. Specifically, McAdams' synthesis of the literature on personal agency should provide a useful beginning for developmentally-informed discussions of the potential evolving nature of QOL and its antecedents, correlates, and consequences, with the goal of ensuring greater relevance of QOL evaluations to all age groups. 相似文献
915.
Robin S. Cronin Minglan Li Kate Culliney Robyn Maude Katherine Nelson 《Women and birth : journal of the Australian College of Midwives》2018,31(5):422-429
Background
Second-degree tears are the most common form of perineal trauma occurring after vaginal birth managed by New Zealand midwives, although little is known about midwives’ perineal practice.Aim
The aim of this study was to identify how midwives managed the last second-degree perineal tear they treated and the level to which their practice reflects National Institute for Health and Care Excellence guidelines.Methods
An (anonymous) online survey was conducted over a six-week period in 2013. New Zealand midwives who self-identified as currently practising perineal management and could recall management of the last second-degree tear they treated were included in the analysis.Findings
Of those invited, 645 (57.1% self-employed, 42.9% employed) were eligible and completed surveys. Self-employed midwives reported greater confidence (88.0% vs 74.4%, p < 0.001) and more recent experience (85.1% vs 57.4%, p < 0.001) with perineal repair than employed midwives. Midwives who left the last second-degree tear unsutured (7.3%) were more likely to report low confidence (48.9% vs 15.4%, p < 0.001) and less recent experience with repair (53.2% vs 24.7%, p < 0.001), and were less likely to report a digital-rectal examination (10.6% vs 49.0%, p < 0.001), compared to midwives who sutured. Care consistent with evidence-based guidelines (performing a digital-rectal examination, 59.4% vs 49.3% p = 0.005; optimal suturing techniques, 62.2% vs 48.7%, p = 0.001) was associated with recent perineal education.Conclusions
Midwives’ management of the last second-degree perineal tear is variable and influenced by factors including: employment status, experience, confidence, and perineal education. There is potential for improvement in midwives’ management through increased uptake of evidence-based guidelines and through ongoing education. 相似文献916.
Britni L. Ayers Nicola L. Hawley Rachel S. Purvis Sarah J. Moore Pearl A. McElfish 《Women and birth : journal of the Australian College of Midwives》2018,31(5):e294-e301
Problem
Pacific Islanders are disproportionately burdened by poorer maternal health outcomes with higher rates of pre-term births, low birth weight babies, infant mortality, and inadequate or no prenatal care.Purpose
The purpose of this study was twofold: (1) to explore maternal health care providers’ perceptions and experiences of barriers in providing care to Marshallese women, and (2) providers perceived barriers of access to care among Marshallese women. This is the first paper to explore perceived barriers to maternal health care among a Marshallese community from maternal health care providers’ perspectives in the United States.Methods
A phenomenological, qualitative design, using a focus group and in-depth interviews with 20 maternal health care providers residing in northwest Arkansas was chosen.Findings
Several perceived barriers were noted, including transportation, lack of health insurance, communication and language, and socio-cultural barriers that described an incongruence between traditional and Western medical models of care. There was an overall discord between the collectivist cultural identity of Marshallese families and the individualistic maternal health care system that merits further research.Discussion
Solutions to these barriers, such as increased cultural competency training for maternal health care providers and the incorporation of community health workers are discussed. 相似文献917.
In this article we outline and demonstrate a design anthropological approach to investigating automated mobile futures as a processual opening up of possibilities, rather than as a process of technological innovation. To undertake this we investigate the example of how the car-smartphone relationship is configuring in the contingent circumstances of the mobile present and the implications of this for automated mobile futures. Our discussion is set in the context of the growing possibility that automonous driving (AD) features are increasingly part of everyday mobilities (even if unequally distributed globally) and in which personal mobile smart technologies and artificial intelligence (AI) will exist in some form and will interface with humans and be interoperable with other technologies. In developing this we draw on ethnographic understandings of how people live with the possibilities afforded by technologies in everyday life. 相似文献
918.
919.
920.
We examine how men and women in mixed-gender unions change the time they allocate to housework in response to labor market promotions and terminations. Operating much like raises, such events have the potential to alter intra-household power dynamics. Using Australian panel data, we estimate couple-specific fixed effects models and find that female promotion has the strongest association with housework time allocation adjustments. These adjustments are in part attributable to concurrent changes in paid work time, but gender power relations also appear to play a role. Further results indicate that households holding more liberal gender role attitudes are more likely to adjust their housework time allocations after female promotion events. Power dynamics cannot, however, explain all the results. Supporting the sociological theory that partners may “do gender,” we find that in households with more traditional gender role attitudes, his housework time falls while hers rises when he is terminated. 相似文献