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   3297篇
  免费   90篇
管理学   506篇
民族学   26篇
人才学   1篇
人口学   287篇
丛书文集   27篇
理论方法论   336篇
综合类   38篇
社会学   1725篇
统计学   441篇
  2023年   27篇
  2022年   18篇
  2021年   31篇
  2020年   76篇
  2019年   87篇
  2018年   97篇
  2017年   138篇
  2016年   121篇
  2015年   92篇
  2014年   102篇
  2013年   511篇
  2012年   139篇
  2011年   118篇
  2010年   79篇
  2009年   104篇
  2008年   98篇
  2007年   81篇
  2006年   87篇
  2005年   105篇
  2004年   99篇
  2003年   91篇
  2002年   90篇
  2001年   89篇
  2000年   73篇
  1999年   56篇
  1998年   41篇
  1997年   35篇
  1996年   49篇
  1995年   40篇
  1994年   37篇
  1993年   53篇
  1992年   40篇
  1991年   37篇
  1990年   31篇
  1989年   25篇
  1988年   26篇
  1987年   24篇
  1986年   26篇
  1985年   23篇
  1984年   32篇
  1983年   25篇
  1982年   29篇
  1981年   23篇
  1980年   21篇
  1979年   24篇
  1978年   13篇
  1977年   24篇
  1975年   23篇
  1974年   20篇
  1973年   11篇
排序方式: 共有3387条查询结果,搜索用时 15 毫秒
111.
In this study, I examine disparities in schooling progress among children born to immigrant and U.S.-born blacks. I find that in one- and two-parent families, children born to black immigrants are less likely to fall behind in school than those born to U.S.-born blacks. In two-parent immigrant families, children born to two immigrant parents have a significant schooling advantage over children born to one immigrant parent. While children born to two immigrant parents in the wealthiest black immigrant families do better in the second generation than in the first, the reverse is observed among children in less wealthy families. These findings contribute in two ways to our understanding of the assimilation processes of children born to black immigrant parents. First, they show that there is a positive association between the number of immigrant parents in a family and children’s schooling performance. Second, they suggest that disparities in the assimilation patterns of the children of black immigrants are a likely product of the interaction between their parental characteristics and the socioeconomic circumstances of their families.  相似文献   
112.
113.
The study explores and distinguishes links between parental status (childless persons, parents with residential children, and empty nest parents) and a range of psychological well-being outcomes in midlife and old age. Data are from the first wave of the Norwegian Life Course, Ageing and Generation (NorLAG) study (n = 5,189). We separate outcomes into cognitive (life satisfaction and self-esteem) and affective (positive and negative affect, depression, loneliness) components. Parental status has a net effect on cognitive well-being among women, as childless women report significantly lower life satisfaction and self-esteem than both mothers with residential children and empty nest mothers. However, motherhood is inconsequential for affective well-being. Among men, parental status is unrelated to any of the well-being aspects. Parental status effects are not modified by age, marital status, and education. The results demonstrate the importance of investigating the effect of parental status and other objective circumstances on a range of psychological well-being outcomes. Furthermore, the results reviewed and presented indicate somewhat more positive effects of parenthood in the Nordic countries than in the US, highlighting the role of social policies in shaping the impact of parental status on well-being.  相似文献   
114.
Tourists come to museums with varied expectations and leave appreciating different aspects of their presentations. Thus, tourists/audiences are primed to see, hear, and experience certain representations and narratives when they enter museums. This is particularly so with plantation museums. Most Americans possess at the very least a vague sense of the antebellum South. They have a vague sense of a time and of a place populated by wealthy and esteemed plantation owners and their Black enslaved labor. We use, as our raw material, visitors’ responses to the question: “What is your level of interest in ...,” ten topics related to plantations’ presentations. This question was asked of visitors returning from tours at three plantation museums. Specifically, all three differ in their presentation of enslavement and as so, have been selected to represent the spectrum of plantation museums in regards to presentation of slavery and enslaved labor. It is expected that the differences in presentations at the three sites reflect differences in plantation audiences. To this effect, plantation audiences are mapped and viewed through the framework of social representation theory in an attempt to discern social representation communities using visitors’ levels of interest in topics/items presented on plantation tours at sites. Disregarding incidental cultural tourists, we found there to be basically two social representations that visitors to these three plantation museums hold: a nostalgic social representation and a Janus social representation.  相似文献   
115.
This paper considers estimation and prediction in the Aalen additive hazards model in the case where the covariate vector is high-dimensional such as gene expression measurements. Some form of dimension reduction of the covariate space is needed to obtain useful statistical analyses. We study the partial least squares regression method. It turns out that it is naturally adapted to this setting via the so-called Krylov sequence. The resulting PLS estimator is shown to be consistent provided that the number of terms included is taken to be equal to the number of relevant components in the regression model. A standard PLS algorithm can also be constructed, but it turns out that the resulting predictor can only be related to the original covariates via time-dependent coefficients. The methods are applied to a breast cancer data set with gene expression recordings and to the well known primary biliary cirrhosis clinical data.  相似文献   
116.
There are obvious reasons why residential construction should depend on the population’s age structure. We estimate this relation on Swedish time series data and Organization for Economic Cooperation and Development panel data. Large groups of young adults are associated with higher rates of residential construction, but there is also a significant negative effect from those above 75. Age effects on residential investment are robust and forecast well out-of-sample in contrast to the corresponding house price results. This may explain why the debate around house prices and demography has been rather inconclusive. Rapidly aging populations in the industrialized world makes the future look bleak for the construction industry.
Bo MalmbergEmail:
  相似文献   
117.
A single latent variable model of health status and therapeutic health care utilization is estimated for parents and own children of 6,557 US households. The equation system that identifies latent health status simultaneously determines a number of indicators of general health, including presence of morbidity symptoms, mobility limitations, medication needs, and utilization of therapeutic health care services. The main goal of the paper was to obtain an unbiased estimate of parents’ marginal substitution rate between own and child health. Results indicate that parents’ valuation of their children’s health exceeds their valuation of own health by almost twofold on average.
Thomas D. CrockerEmail:
  相似文献   
118.
Population Research and Policy Review -  相似文献   
119.
120.
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