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   260篇
  免费   4篇
管理学   45篇
民族学   1篇
人口学   25篇
理论方法论   28篇
社会学   155篇
统计学   10篇
  2023年   1篇
  2020年   6篇
  2019年   6篇
  2018年   8篇
  2017年   9篇
  2016年   5篇
  2015年   16篇
  2014年   7篇
  2013年   50篇
  2012年   9篇
  2011年   9篇
  2010年   7篇
  2009年   10篇
  2008年   8篇
  2007年   22篇
  2006年   8篇
  2005年   10篇
  2004年   12篇
  2003年   7篇
  2002年   8篇
  2001年   5篇
  2000年   2篇
  1999年   6篇
  1998年   1篇
  1997年   2篇
  1996年   3篇
  1995年   2篇
  1994年   1篇
  1993年   1篇
  1992年   1篇
  1991年   3篇
  1990年   1篇
  1989年   2篇
  1988年   5篇
  1987年   2篇
  1986年   2篇
  1985年   1篇
  1983年   2篇
  1979年   1篇
  1976年   1篇
  1974年   1篇
  1972年   1篇
排序方式: 共有264条查询结果,搜索用时 15 毫秒
201.
The authors used data from the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development (N = 1,364) to examine maternal work hour status and parenting (sensitivity and learning opportunities) from infancy through middle childhood. Work hour status was conceptualized as nonemployment, part time, and full time. Adjusting for covariates, mothers employed part time had higher sensitivity scores and higher provision of child learning opportunity scores than did mothers who were not employed, and these differences characterized families during early childhood rather than middle childhood. Mothers' provision of child learning opportunities was greater when she was employed full time (vs. part time) during early childhood. In addition to child age, mothers' ethnic minority status and partner status moderated the association between maternal work hour status and mothers' parenting. In general, the findings supported ideas forwarded by role expansionist theory.  相似文献   
202.
The dominant approach to studying historical race-related fertility differences has been to limit samples to first-married and younger women. We argue that studying historical race-related fertility differences in the context of remarriage is also important: remarriage and fertility patterns are both rooted in the biosocial conditions that produce racial disparities in health. We employ a multiple causes framework that attributes variation in fertility patterns to voluntary limitation and involuntary factors (infecundity/subfecundity). We use data from the 1910 Integrated Public Use Microdata Series and estimate zero-inflated negative binomial models that simultaneously distinguish those who are infecund (vs. fecund) and estimate the number of remarital births among the fecund. Our approach allows us to evaluate historical remarital (in)fertility differences, accounting for marital, socioeconomic, and geographic influences on fecundity and fertility, while empirically accounting for the influence of children “missing” from the household due to mortality and fostering/aging out. Consistent with past studies that emphasized poorer African American health as a major influence on involuntary infertility, we find that African American women were more likely than white women to be in the always-zero (infecund) group and to have fewer remarital births. Supplemental analyses nuance these findings but indicate that these results are robust. Overall, we find support for a multiple-causes perspective: while the findings are consistent with the adoption of deliberate fertility control among urban and higher-status women at higher parities, remarital fertility differences in 1910 also reflected greater infecundity/subfecundity among subgroups of women, especially African American women.  相似文献   
203.
204.
Although self-reported gambling urge intensities have clinical utility in the treatment of pathological gambling (PG), prior studies have not investigated their neural correlates. Functional magnetic resonance imaging (fMRI) was conducted while 10 men with PG and 11 control comparison (CON) men viewed videotaped scenarios of gambling, happy or sad content. Participants rated the intensity of their emotions and motivations and reported the qualities of their responses. Relative to the CON group, the PG group reported similar responses to sad and happy scenarios, but stronger emotional responses and gambling urges when viewing the gambling scenarios. Correlations between self-reported responses and brain activations were typically strongest during the period of reported onset of emotional/motivational response and more robust in PG than in CON subjects for all conditions. During this epoch, corresponding with conscious awareness of an emotional/motivational response, subjective ratings of gambling urges in the PG group were negatively correlated with medial prefrontal cortex activation and positively correlated with middle temporal gyrus and temporal pole activations. Sadness ratings in the PG group correlated positively with activation of the medial orbitofrontal cortex, middle temporal gyrus, and retrosplenial cortex, while self-reported happiness during the happy videos demonstrated largely inverse correlations with activations in the temporal poles. Brain areas identified in the PG subjects have been implicated in explicit, self-referential processing and episodic memory. The findings demonstrate different patterns of correlations between subjective measures of emotions and motivations in PG and CON subjects when viewing material of corresponding content, suggesting in PG alterations in the neural correlates underlying experiential aspects of affective processing.  相似文献   
205.
Information technology has profoundly impacted the operations of firms in the service industry and service environments within manufacturing. Two models are introduced that establish a conceptual framework linking firm profit to attributes of the IT‐worker system. The framework considers the impact of IT capabilities (such as functionality and ease‐of‐use) and worker skill as drivers of output volume and quality. The framework contrasts attributes of the IT‐worker systems when services are mass‐produced (flow shop) versus customized (job shop). Mathematical models are introduced to formalize the conceptual framework. Numerical examples are presented that illustrate the types of insights that can be obtained from the models.  相似文献   
206.
We identify and analyze a scenario where a firm first opens up what we call a “detached” market, by offering a new product that meets a customer need that is very different from (i.e., detached from) the need met by the old established product. Our analysis builds on the previous studies that describe alternate ways in which a new product might open a new market and ultimately encroach on an existing market. Consider the example of cell phones: They opened up a new detached market by meeting the customer need for mobility, a need very different from the traditional attribute of reception quality. By meeting an important detached need, a new product can sell at a high price, even though it might be woefully deficient with regard to the traditional performance dimension (the reception/coverage of early cell phones was sorely lacking). A person who is a high‐end customer for the old product initially despises the new product as a replacement for the old one but might simultaneously be one of the first customers for the new product because it fills the detached‐market need. Over time, the new product improves along the traditional dimension (e.g., cell phone reception/coverage has dramatically improved), and eventually it becomes a replacement for the old product, encroaching from the lower end upward (the first customers to drop their landlines have been lower‐end customers such as students and apartment dwellers, whereas higher‐end business customers still have landlines in their offices). We call this the detached‐market form of low‐end encroachment and show how it helps explain the conundrum of an expensive “disruptive” innovation. We go on to relate our results to the finding that “willingness to cannibalize” is a key factor in an incumbent firm's growth and survival, and to the “blue ocean strategy.”  相似文献   
207.
Growing acknowledgement of the importance of the role of kinship carers in caring and supporting children and young people in Scotland has led to a burgeoning of research on this topic. However, most research has tended to focus on the role of kinship carers. A significant gap has been direct studies into the views and experiences of children and young people living with relatives or friends. This paper seeks to address this by drawing on the findings from a small‐scale qualitative collaborative research project with 12 children and young people living in informal and formal kinship care in the Northeast of Scotland. The literature on foster and kinship care is reviewed and key themes identified. The qualitative research data is outlined employing a thematic analysis approach. The key findings are analysed with a view to the potential implications for policy and practice. The paper concludes with proposals for potential future research.  相似文献   
208.
In order to gain competitive advantage, a firm must link its technology choice to its total manufacturing strategy and business unit's goals. A dynamic model is presented to examine the strategic decision concerning the acquisition of flexible manufacturing systems (FMS) technology. A major contribution of this model is its ability to capture the strategic benefits of FMS with respect to economies of scope and technological progress. Decisions such as the timing and size of new technology acquisition and the scrapping of conventional capacity are explored as a firm plans for the upgrading of its facility to meet future dynamic strategic goals. This model may be used to assist with strategic planning because it identifies the critical relationships and trade-offs between various exogenous forces (such as market growth or decay, the cost of acquiring flexible manufacturing systems, and the rate of technological progress) and the decision variables considered.  相似文献   
209.
Using 2016 household survey data from Tanzania, we define and measure resilience within the context of Population, Health, and Environment programming and quantify the link between resilience and family planning. We created a multicomponent model using confirmatory factor analysis in a structural equation modeling context. Factor loadings for eight defined latent factors of resilience were statistically significant (p?<?0.001). We created a factor called “FP-MCH” reflecting awareness, attitudes, and access to family planning (FP) and health care services and use of maternal and child health care (MCH) facilities. Analysis, with controls, shows that a 1 standard deviation (SD) increase in FP/MCH was associated with a 0.68 SD increase in resilience (p?<?0.01), suggesting that the association between FP/MCH and resilience is robust across a range of factors. Analyses showed that the association between FP/MCH is broadly related to the construct of resilience and not through any single component. This study supports the importance of including FP/MCH as part of integrated projects to enhance resilience.  相似文献   
210.
Political public relations became headline news when Kellyanne Conway, Advisor to U.S. President Trump, described provable falsehoods as alternative facts. Other memorable/misstatements became part of the cultural zeitgeist even as journalists continued to interview her. Public relations professionals are inextricably connected to the journalists who shape public opinion. The author therefore conducted a qualitative framing analysis to understand how journalists framed her occupational role and job performance. Articles from The New York Times and The Wall Street Journal revealed that journalists assigned Advocacy and Gendered framing for her occupational role. Analysis also indicated that journalists alternately depicted her performance as adequate, unreliable, and manipulative. The author considers implications of findings for public relations professionals.  相似文献   
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