全文获取类型
收费全文 | 2518篇 |
免费 | 50篇 |
专业分类
管理学 | 317篇 |
民族学 | 25篇 |
人口学 | 256篇 |
丛书文集 | 13篇 |
理论方法论 | 212篇 |
综合类 | 32篇 |
社会学 | 1205篇 |
统计学 | 508篇 |
出版年
2023年 | 15篇 |
2022年 | 14篇 |
2021年 | 16篇 |
2020年 | 39篇 |
2019年 | 63篇 |
2018年 | 79篇 |
2017年 | 104篇 |
2016年 | 102篇 |
2015年 | 58篇 |
2014年 | 86篇 |
2013年 | 514篇 |
2012年 | 70篇 |
2011年 | 65篇 |
2010年 | 61篇 |
2009年 | 39篇 |
2008年 | 59篇 |
2007年 | 57篇 |
2006年 | 54篇 |
2005年 | 58篇 |
2004年 | 51篇 |
2003年 | 36篇 |
2002年 | 56篇 |
2001年 | 55篇 |
2000年 | 41篇 |
1999年 | 38篇 |
1998年 | 40篇 |
1997年 | 25篇 |
1996年 | 25篇 |
1995年 | 29篇 |
1994年 | 31篇 |
1993年 | 33篇 |
1992年 | 29篇 |
1991年 | 34篇 |
1990年 | 22篇 |
1989年 | 16篇 |
1988年 | 36篇 |
1987年 | 31篇 |
1986年 | 24篇 |
1985年 | 20篇 |
1984年 | 19篇 |
1983年 | 26篇 |
1982年 | 19篇 |
1981年 | 25篇 |
1980年 | 21篇 |
1979年 | 24篇 |
1978年 | 28篇 |
1977年 | 21篇 |
1976年 | 23篇 |
1975年 | 31篇 |
1974年 | 15篇 |
排序方式: 共有2568条查询结果,搜索用时 250 毫秒
11.
Unemployment rates differ widely and persistently across counties. This article examines equilibrium forces related to this geographic disparity with a focus on California. We show that although seasonal variation in employment can account for some of the differences, it cannot explain the total variation. Factors such as educational attainment, age, and gender appear to be strongly related to unemployment differences. Individuals living in higher‐unemployment areas also have a lower propensity to migrate. Because migration is usually considered to be the main equilibrating force, this evidence helps further explain why unemployment rates across counties are persistently different. 相似文献
12.
13.
In the paper we present a new method of calculating sampling intervals, so-called windows, allowing an experimenter some flexibility in timing the sample collection, while a minimum required design efficiency for parameter estimation is assured. The method is based on the Equivalence Theorem for D-optimality what makes the length of each window related to the parameter sensitivities. An example of calculating the windows in a pharmacokinetic study is presented. Some other methods of calculating efficient sampling windows are briefly discussed. 相似文献
14.
James S. Jackson Ivy Forsythe-Brown Ishtar O. Govia 《The Journal of social issues》2007,63(4):729-743
Immigration is contributing to the U.S. population becoming increasingly ethnically diverse. This article examines the role of family relations and well-being among different generations of Black Caribbean immigrants. Family disruptions, such as migration, can have complex effects on the support networks and emotional well-being of family members. Data from a recently completed national study of American Blacks in the United States, however, reveal significant similarities across ancestry and immigrant status in family contact, solidarity and well-being. It is concluded that intrafamilial relations may serve to overcome barriers of geographical distance in providing comparable levels of contact, solidarity, and well-being for both U.S.-born and immigrant Black Caribbean family members of different generations. Because of the increasing numbers of immigrant elders, these sources of family support will become increasingly more important in bridging the gaps between government resources and needed assistance in an aging society. 相似文献
15.
16.
Don A. Dillman Tommy L. Brown John E. Carlson Edwin H. Carpenter Frederick O. Lorenz Robert Mason John Saltiel Roberta L. Songster 《Rural sociology》1995,60(4):674-687
Abstract Past research suggests that mail surveys encourage a primacy effect, which is a tendency to choose the first answers from a list, whereas telephone surveys encourage a recency effect, a tendency to choose the last answers from a list. This paper summarizes results from 82 new experiments conducted in 12 separate surveys in seven states. Only four of 33 mail survey comparisons exhibited significant primacy effects, while five of 26 experiments in telephone surveys exhibited recency effects. In addition, only three of 23 cross-method comparisons produced a significant primacy/recency effect in the expected manner. The conclusion is that the prevalence of primacy and recency effects has been over-estimated by past research and a new theoretical approach that takes into account multiple causation is needed for examining these effects. 相似文献
17.
18.
Edward A. Hanna Ph.D. 《Clinical Social Work Journal》1993,21(3):283-300
This paper explores an unusual and innovative application of psychodynamically oriented clinical social work method to the sports area. The coach of a national Olympics team requested a clinical consultation because he suspected that there might be psychosocial reasons why a certain number of world class atheletes he was coaching were not performing up to their full potential. 相似文献
19.
Continued economic stagnation, civil unrest, rural-urban migration, and a series of natural disasters have impeded efforts in the Sudan to integrate women into the development process. Although the Four-Year (1988-1989 to 1991-92) Salvation, Recovery, and Development Programs Plan does not explicitly addresses women's issues, its emphasis on food security, appropriate technology for the agricultural sector, small-scale industries and handicrafts, balanced regional development, and the needs of the poorest 20% of the population guarantees that women will be major recipients. There remains a need, however, to increase women's participation in the development planning process and to base projects on reliable data on women's economic activities. More successful in defining women's needs have been community development projects--Western Savannah Development Corporation, Blue Nile Integrated Rural Development Project, Nuba Mountain Project, and Jebel Marra Rural Development Project--that combine income generation, social welfare, and agricultural research. It is recommended that all such large integrated rural development or agricultural projects allot funds specifically for women's activities and ensure coordination with women's organizations to avoid duplication and identify areas of greatest need. Also urged is the development of appropriate technologies that will alleviate women's double burden of poverty and household chores and address the inequitable distribution of income. Establishment of a women's bureau for women's affairs and development within the National Planning Department would facilitate project formulation and evaluation. In need of change if women in development projects in the Sudan are to be successful are laws that limit female land ownership and practices that deny women loans and credit. 相似文献
20.
Odaman OM 《Habitat International》1992,16(1):113-120
Data concerning 624 randomly selected mothers in Ekpoma Region, Nigeria, are used to analyze socioeconomic and cultural determinants of fertility. Factors considered include education, occupation, income, religion, age at first marriage, breast-feeding, and contraceptive practice. The author concludes that the conditions for fertility decline are now in place and that this decline could be accelerated by discouraging early marriage, increasing female education, and promoting contraception. 相似文献