首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2027篇
  免费   78篇
管理学   260篇
民族学   20篇
人才学   1篇
人口学   202篇
丛书文集   14篇
理论方法论   288篇
综合类   21篇
社会学   1023篇
统计学   276篇
  2024年   4篇
  2023年   26篇
  2022年   15篇
  2021年   33篇
  2020年   74篇
  2019年   94篇
  2018年   88篇
  2017年   113篇
  2016年   116篇
  2015年   73篇
  2014年   73篇
  2013年   301篇
  2012年   104篇
  2011年   99篇
  2010年   79篇
  2009年   70篇
  2008年   61篇
  2007年   62篇
  2006年   61篇
  2005年   50篇
  2004年   62篇
  2003年   47篇
  2002年   39篇
  2001年   22篇
  2000年   22篇
  1999年   24篇
  1998年   25篇
  1997年   19篇
  1996年   19篇
  1995年   17篇
  1994年   28篇
  1993年   19篇
  1992年   23篇
  1991年   13篇
  1990年   10篇
  1989年   11篇
  1988年   11篇
  1987年   5篇
  1986年   6篇
  1985年   11篇
  1984年   5篇
  1983年   7篇
  1982年   5篇
  1981年   5篇
  1980年   9篇
  1979年   9篇
  1978年   5篇
  1976年   7篇
  1974年   4篇
  1971年   4篇
排序方式: 共有2105条查询结果,搜索用时 0 毫秒
991.
992.
Traditional labor supply models grounded in the trade-off between labor and leisure are incomplete to the extent that they neglect time spent in home production: productive labor that is not exchanged in a market setting. Models that do incorporate home production typically predict a negative relationship with the wage rate, a relationship emphasized by most analyses of time devoted to home production during recessions. However, empirical studies of the behavior of home production over the business cycle find that home production is relatively acyclical. The prominence of the fall in house values during the Great Recession suggests an alternative driver of hours dedicated to home production: non-labor endowments and assets, specifically housing equity. This paper explores the role that changing house values play in determining time dedicated to home production using the American Time Use Survey. It concludes that on the margin, time allocation responds to changes in house values in the anticipated way only under certain conditions. Specifically, when non-owners are excluded from the analysis the anticipated results do not hold. Some suggestions to explain this result are provided, as well as a discussion of future clarifying research.  相似文献   
993.
The purpose of this study was to determine whether toddlers exhibit different eye‐movement patterns when watching real events versus video demonstrations in an object‐retrieval task. Twenty‐four‐month‐olds (= 36) searched for a sticker on a felt board after watching an experimenter hide it behind a felt object in person or via video. Eye movements during the hiding event were recorded. Compared to those watching in‐person events, children watching video spent more time looking at the target location overall, yet they had relatively poor search performance. Visual attention to the target location predicted search performance in the video condition only; children who watched in‐person hiding events had high success rates even if they paid relatively little visual attention to the correct location. Findings are consistent with the hypothesis that toddlers process information more quickly for in‐person (versus video) events, enabling them to learn as well (or better) despite relatively low selective attention. Thus, relatively poor encoding, as well as memory retrieval, may underlie the video deficit.  相似文献   
994.
The decision of eligible households to participate in the food stamp program is analyzed utilizing the 1986 Panel Study of Income Dynamics. Less than one-half of the sample of eligible households receive food stamps in 1986. The results of a multinomial logit model suggest that participation is related negatively to the age and educational level of the household head and positively to the benefit level. Participation is lower for single men and households residing in the West and higher for people with disabilities and households receiving some form of public transfer income. Problems regarding information about food stamps and personal attitudes toward food stamp use have the greatest impact on the decision to participate.  相似文献   
995.
Abstract Industrial restructuring has altered economic circumstances in the U.S., but the influences of these changes on family structure are not clear. This study examines whether industrial restructuring influences female headship and whether these effects differ in nonmetro and metro counties. Results based on data from the 1980 and 1990 U.S. Census of Population and Housing Summary Tape Files indicate several conclusions. First, female headed households increased more rapidly in nonmetro than metro counties from 1980 to 1990, although there was a great deal of variation across counties. Second, industrial restructuring contributed to change in female headship in nonmetro and metro counties, and changes in various industries had differing effects on female headship. Third, overall gains in women's employment in a county had no influence on formation of female headed households, gains in men's employment deterred female headship, and gains for women in specific industries tended to slow formation of these households. Fourth, controlling for changes in median income and part-time work did little to reduce the industry-specific influences on change in female headship. The results suggest that linkages between industrial restructuring and family structure do exist, although the models are less able to explain changes in female headship in nonmetro than in metro counties.  相似文献   
996.
This study used an ecological perspective to examine how daily variation in the time fathers spend in child‐care activities was related to emotionally supportive or conflictual father‐child interactions and whether fathers' negative mood moderated these associations. Data for the present analyses were from 2 daily diary studies. Both studies asked fathers to report about their daily experiences with their children, including how much time they spent with them and whether or not they had any supportive interactions or conflictual interactions. The first study used daily self‐report questionnaires from a sample of fathers in rural upstate New York, and the second study used daily telephone interviews from a national sample of fathers. Results from a series of hierarchical linear models showed that fathers were more likely to have supportive and conflictual interactions on days when they spent more time engaged in child‐care activities. The association between time with children and conflictual interactions was greater on days when fathers were in a negative mood. Negative mood did not moderate the association between time with children and emotionally supportive interactions. The findings from this study suggest that when fathers spend more time with their children they are more likely to engage in supportive interactions, regardless of negative mood.  相似文献   
997.
Abstract In this paper we examine the effectiveness of growth management policies in Wisconsin cities, villages, and towns. Unlike most other studies, we consider the impact of growth management policies on agriculture, specifically the preservation of farmland, in addition to population growth. Our analysis examines these relationships separately in towns and in cities/villages because of differences in their institutional structures. We mailed a survey to every city, village, and town in Wisconsin; the surveys were supplemented by data collected from several secondary sources. For both towns and cities/villages, growth management policies are related positively to the rate of population growth. The fiscal structure of localities proved to have a stronger effect on population growth for cities and villages than for towns. Growth management capacity had little effect for either type of municipality. The analysis of farmland preservation suggests that exclusive agriculture zoning is marginally effective in limiting farmland conversion in towns, but ineffective in cities/villages.  相似文献   
998.
Analyzing data from a probability sample representative of secondary school students in Singapore (N = 1,599), this study examined the independent impact between the quality of mother–child relationship, the quality of father–child relationship and family conflict on the frequency of drinking and drunkenness, and whether each dyadic parent–child relationship quality and family conflict moderate the effect of direct peer pressure on the frequency of drinking and drunkenness among Singaporean adolescents. A series of ordered logit analyses revealed the following results: The quality of father–child relationship had no main effect on either drinking behavior, yet had a moderating effect on the association between direct peer pressure and drunkenness, with the stronger effect of direct peer pressure for adolescents on good terms with their fathers than for those on poor terms with their fathers. Family conflict had a main effect on drunkenness and a moderating effect on the association between direct peer pressure and the frequency of drinking, with the stronger effect of direct peer pressure on the frequency of drinking for adolescents experiencing high family conflict than those experiencing low family conflict. The importance of the father–child relationship quality and family conflict for adolescents’ well-being in Singapore as an Asian context was discussed.  相似文献   
999.
This study examined developmental trajectories of social justice values (SJV) in a representative sample of Swiss adolescents (N = 1258) at 15 (Time 1), 18 (Time 2), and 21 years of age (Time 3). SJV and friendship quality were measured via self‐reports. Sympathy was assessed via self‐ and mother‐reports. Latent class growth analysis revealed three developmental trajectories of SJV: high‐stable (80 percent), moderate‐decreasing (17 percent), and low‐increasing (3 percent). Adolescents with low levels of self‐ and mother‐reported sympathy were more likely to be members of the low‐increasing than the high‐stable or moderate decreasing trajectory groups. Adolescents who reported low levels of sympathy and friendship quality at 15 years of age were more likely to be members of the moderate‐decreasing trajectory group than the high‐stable trajectory group. Results are discussed with respect to the potential significance of sympathy and friendship quality for understanding the development of SJV during adolescence.  相似文献   
1000.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号