全文获取类型
收费全文 | 3094篇 |
免费 | 793篇 |
专业分类
管理学 | 777篇 |
民族学 | 9篇 |
人口学 | 83篇 |
丛书文集 | 5篇 |
理论方法论 | 653篇 |
综合类 | 4篇 |
社会学 | 2002篇 |
统计学 | 354篇 |
出版年
2021年 | 69篇 |
2020年 | 140篇 |
2019年 | 309篇 |
2018年 | 132篇 |
2017年 | 216篇 |
2016年 | 267篇 |
2015年 | 269篇 |
2014年 | 240篇 |
2013年 | 425篇 |
2012年 | 203篇 |
2011年 | 193篇 |
2010年 | 169篇 |
2009年 | 133篇 |
2008年 | 162篇 |
2007年 | 106篇 |
2006年 | 125篇 |
2005年 | 96篇 |
2004年 | 103篇 |
2003年 | 89篇 |
2002年 | 65篇 |
2001年 | 71篇 |
2000年 | 62篇 |
1999年 | 22篇 |
1998年 | 10篇 |
1997年 | 7篇 |
1996年 | 10篇 |
1995年 | 5篇 |
1994年 | 12篇 |
1993年 | 14篇 |
1992年 | 6篇 |
1991年 | 10篇 |
1990年 | 4篇 |
1989年 | 9篇 |
1988年 | 12篇 |
1987年 | 6篇 |
1986年 | 5篇 |
1985年 | 11篇 |
1984年 | 4篇 |
1983年 | 8篇 |
1982年 | 7篇 |
1981年 | 3篇 |
1980年 | 6篇 |
1979年 | 7篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 11篇 |
1975年 | 8篇 |
1974年 | 6篇 |
1973年 | 8篇 |
1970年 | 4篇 |
排序方式: 共有3887条查询结果,搜索用时 296 毫秒
921.
922.
When spatial data are correlated, currently available data‐driven smoothing parameter selection methods for nonparametric regression will often fail to provide useful results. The authors propose a method that adjusts the generalized cross‐validation criterion for the effect of spatial correlation in the case of bivariate local polynomial regression. Their approach uses a pilot fit to the data and the estimation of a parametric covariance model. The method is easy to implement and leads to improved smoothing parameter selection, even when the covariance model is misspecified. The methodology is illustrated using water chemistry data collected in a survey of lakes in the Northeastern United States. 相似文献
923.
Belkacem Abdous Anne‐Laure Fougres Kilani Ghoudi 《Revue canadienne de statistique》2005,33(3):317-334
The authors examine the asymptotic behaviour of conditional threshold exceedance probabilities for an elliptically distributed pair (X, Y) of random variables. More precisely, they investigate the limiting behaviour of the conditional distribution of Y given that X becomes extreme. They show that this behaviour differs between regularly and rapidly varying tails. 相似文献
924.
925.
926.
927.
Departing from the seminal question that Coase raised in his 1937 work, this article discusses and assesses incomplete contracts
theories’ analyses of the firm’s boundaries—notably transaction cost theory and the modern theory of property rights—by investigating
the case of the vertical network organization (VNO). We perform a theoretical characterization and analysis of the functioning
rules of the VNO to shed light on intra-network incentive provisions and coordination mechanisms. Our findings cast doubt
on the role that hold-up considerations on the firm’s boundaries play and allow us to question forms of power within the VNO.
Finally, we focus on the theoretical implications of the emergence of the VNO. The legal nature of the firm does not match
the economic definition of the VNO, which tends to treat the firm as a specific governance structure. 相似文献
928.
929.
Zoe E. Taylor Michael J. Sulik Nancy Eisenberg Tracy L. Spinrad Kassondra M. Silva Kathryn Lemery‐Chalfant Daryn A. Stover Brian C. Verrelli 《Social Development》2014,23(3):433-450
We used observed parenting behaviors, along with genetic variants and haplotypes of the serotonin transporter gene (SLC6A4), as predictors of children's ego‐resiliency during early childhood (N = 153). The quality of mothers' parenting was observed at 18 months of age, and mothers' reports of ego‐resiliency were collected at six time points from 18 to 84 months. Genetic data were collected at 72 months. Observed parenting was positively associated with initial levels of children's ego‐resiliency. Furthermore, although individual genetic variants of the serotonin transporter gene (LPR, STin2) were not associated with ego‐resiliency, the S10 haplotype (that combines information from these two variants) was negatively associated with initial levels of ego‐resiliency. Both parenting and serotonin genetic variation uniquely predicted children's ego‐resiliency, suggesting an additive effect of genetic and parental factors. 相似文献
930.
Rosemary Leonard Jenny Onyx Helen Hayward‐Brown 《The Australian journal of social issues》2005,40(3):411-425
Organisations providing human services are under increasing pressure to demonstrate quality from a range of sources such as new legislation and new requirements for government funding. Four dimensions for examining quality, derived from program evaluation theory, illustrated some of the contradictions surrounding these expectations. The research used a qualitative and grounded approach to exploring clients', volunteers' and coordinators' notions of quality service. The clients' and volunteers' perceptions of quality were highly experiential, related to the specific context and focussed on strong trusting personal relationships. Clients were also very conscious of their lack of power. Coordinators used a combination of approaches to try to satisfy the demands of clients, volunteers and bureaucracy. 相似文献