全文获取类型
收费全文 | 19560篇 |
免费 | 458篇 |
国内免费 | 2篇 |
专业分类
管理学 | 2727篇 |
民族学 | 74篇 |
人才学 | 1篇 |
人口学 | 1706篇 |
丛书文集 | 93篇 |
教育普及 | 2篇 |
理论方法论 | 1796篇 |
综合类 | 419篇 |
社会学 | 9836篇 |
统计学 | 3366篇 |
出版年
2020年 | 270篇 |
2019年 | 329篇 |
2018年 | 373篇 |
2017年 | 521篇 |
2016年 | 421篇 |
2015年 | 327篇 |
2014年 | 395篇 |
2013年 | 3237篇 |
2012年 | 558篇 |
2011年 | 501篇 |
2010年 | 353篇 |
2009年 | 374篇 |
2008年 | 428篇 |
2007年 | 441篇 |
2006年 | 392篇 |
2005年 | 511篇 |
2004年 | 438篇 |
2003年 | 375篇 |
2002年 | 403篇 |
2001年 | 449篇 |
2000年 | 444篇 |
1999年 | 432篇 |
1998年 | 329篇 |
1997年 | 306篇 |
1996年 | 331篇 |
1995年 | 304篇 |
1994年 | 324篇 |
1993年 | 292篇 |
1992年 | 357篇 |
1991年 | 363篇 |
1990年 | 359篇 |
1989年 | 341篇 |
1988年 | 334篇 |
1987年 | 305篇 |
1986年 | 306篇 |
1985年 | 289篇 |
1984年 | 337篇 |
1983年 | 314篇 |
1982年 | 248篇 |
1981年 | 210篇 |
1980年 | 217篇 |
1979年 | 260篇 |
1978年 | 218篇 |
1977年 | 185篇 |
1976年 | 170篇 |
1975年 | 146篇 |
1974年 | 162篇 |
1973年 | 134篇 |
1972年 | 95篇 |
1971年 | 98篇 |
排序方式: 共有10000条查询结果,搜索用时 766 毫秒
921.
Family formation changed dramatically over the 20th century in the United States. The impact of these changes on childbearing has primarily been studied in terms of nonmarital fertility. However, changes in family formation behavior also have implications for fertility within marriage. The authors used data from 10 fertility surveys to describe changes in the timing of marital childbearing from the 1940s through the 21st century for non‐Hispanic White and non‐Hispanic Black women. Based on harmonized data from the Integrated Fertility Survey Series, the results suggest increasing divergence in fertility timing for White women. A growing proportion of marriages begin with a premarital conception; at the same time, an increasing proportion of White women are postponing fertility within marriage. For Black women, marital fertility is increasingly postponed beyond the early years of marriage. Evaluating the sequencing of marriage and parenthood over time is critical to understanding the changing meaning of marriage. 相似文献
922.
Research examining parental reports of children's living arrangements has often relied on information about legally ordered custody agreements following divorce. This analysis used data from matched pairs of parents (N = 1,156) in the Fragile Families and Child Wellbeing Study who live apart to compare mother and father reports of their child's residence 5 years after a nonmarital birth. The authors found that over one third of unmarried parents disagreed about who their child lived with and that conflicting reports were much more likely when fathers spent nights with the mother (an indicator of part‐time cohabitation) and had overnights with the child on their own. The results further suggest that discrepancies in unmarried parents' reports were more closely associated with the complexity and ambiguity of their living situations than with the quality of their relationships with each other. Implications for measuring children's living arrangements in families formed outside of marriage are discussed. 相似文献
923.
Relative to White families, Black families have been described as relying on extended social networks to compensate for other social and economic disadvantages. The presence or absence of supportive social networks should be especially relevant to young couples entering marriage, but to date there has been little effort to describe the social networks of comparable Black and White newlyweds. The current study addressed this gap by drawing on interviews with 57 first‐married newlyweds from low‐income communities to compare the composition and structure of Black and White couples' duocentric social networks. The results indicated that low‐income Black couples entered marriage at a social disadvantage relative to White couples, with more family relationships but fewer positive relationships and fewer sources of emotional support (for wives), fewer connections to married individuals, and fewer shared relationships between spouses. Black couples' relative social disadvantages persisted even when various economic and demographic variables were controlled. 相似文献
924.
The author argues that the June 2012 challenge by the ILO Employers' group to the hitherto generally accepted view regarding the right to strike under the Freedom of Association Convention, No. 87, is at odds with the historical understanding of the framework in which the Convention is embedded. She demonstrates how the ILO constituents have consistently recognized that there is a positive right to strike, which is inextricably linked to – and an inevitable corollary of – the right to freedom of association. The article also analyses the relative roles of the ILO supervisory bodies in this regard. 相似文献
925.
Whether government‐based forms of food assistance such as the Supplemental Nutrition Assistance Program (SNAP), communal efforts including food pantries, aid from friends and family, or alternative means such as gardening are the appropriate means to reduce the prevalence of household food insecurity is a continuous source of policy contention. To inform this debate, we examine the relative importance of these forms of food assistance and acquisition to a sample of U.S. older adults from the 2010 Brazos Valley Health Assessment of central Texas households that have been stratified by income eligibility for SNAP, low‐income SNAP ineligibility, and above low income status. To identify how membership in these socioeconomic groups constrains household capacity to acquire sufficient food to maintain an adequate and healthy diet, we explore the varied associations of assets received from government; communal and intimate social networks; and alternative food sources such as gardening, hunting, and fishing with household food security across socioeconomic status, while examining the importance of place of residence on the use of capital assets. SNAP participation was the only specific capital asset associated with all levels of food insecurity for both SNAP‐eligible and ineligible low‐income groups, thus emphasizing the continued importance of food assistance among poverty‐level older adults. 相似文献
926.
Jacob D. Christenson D. Russell Crane Katherine M. Bell Andrew R. Beer Harvey H. Hillin 《Journal of marital and family therapy》2014,40(3):272-286
Despite a number of studies investigating the effect of pharmacotherapy on treatment costs for schizophrenia patients, there has been little attention given to the effect of family intervention. In this study, data from the Kansas Medicaid system were used to analyze healthcare costs for 164 schizophrenia patients who had participated in family intervention. Structural equation modeling was used to test two competing views of the role of family intervention in treatment. The results showed that a model including direct and indirect effects of family intervention provided a better fit to the data. Family intervention had a significant indirect effect on general medical costs (through other psychological treatment) that showed a savings of $586 for each unit increase in the provision of these services. In addition, the total indirect effects for family intervention showed a $580 savings for general medical costs and $796 for hospitalization costs (for each unit increase). 相似文献
927.
928.
Sung Joon Jang Byron R. Johnson Young-Il Kim Edward C. Polson Buster G. Smith 《Sociological focus》2014,47(4):238-267
This study explores whether youth involvement in Scouting has positive consequences later in life. We examine whether the number of years of participation in Scouting is positively associated with human and social capital and recreational lifestyles in adulthood, and whether these are linked to subjective well-being: relational, emotional, and physical health. To explore this potential relationship, we estimated a structural equation model, analyzing data from a national sample of adult males. We found that youth involvement in Scouting is positively related to subjective well-being indirectly via the positive adult outcomes. 相似文献
929.
930.
Shayne R. Anderson Rachel B. Tambling Scott C. Huff Joy Heafner Lee N. Johnson Scott A. Ketring 《Journal of marital and family therapy》2014,40(4):525-534
The Revised Dyadic Adjustment Scale (RDAS; Busby, Crane, Larson, & Christensen, 1995) is a measure of couple relationship adjustment that is often used to differentiate between distressed and non‐distressed couples. While the measure currently allows for a determination of whether group mean scores change significantly across administrations, it lacks the ability to determine whether an individual's change in dyadic adjustment is clinically significant. This study addresses this limitation by establishing a cutoff of 47.31 and reliable change index of 11.58 for the RDAS by pooling data across multiple community and clinical samples. An individual whose score on the RDAS moves across the cutoff changes by 12 or more points can be classified as experiencing clinically significant change. 相似文献