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   19076篇
  免费   150篇
  国内免费   1篇
管理学   2707篇
民族学   138篇
人才学   2篇
人口学   3227篇
丛书文集   44篇
理论方法论   1285篇
综合类   392篇
社会学   8711篇
统计学   2721篇
  2023年   48篇
  2020年   125篇
  2019年   166篇
  2018年   1804篇
  2017年   1901篇
  2016年   1244篇
  2015年   177篇
  2014年   233篇
  2013年   1587篇
  2012年   580篇
  2011年   1372篇
  2010年   1213篇
  2009年   936篇
  2008年   1001篇
  2007年   1146篇
  2006年   210篇
  2005年   405篇
  2004年   440篇
  2003年   378篇
  2002年   279篇
  2001年   190篇
  2000年   202篇
  1999年   214篇
  1998年   160篇
  1997年   153篇
  1996年   173篇
  1995年   130篇
  1994年   129篇
  1993年   130篇
  1992年   132篇
  1991年   150篇
  1990年   150篇
  1989年   163篇
  1988年   118篇
  1987年   124篇
  1986年   119篇
  1985年   132篇
  1984年   111篇
  1983年   125篇
  1982年   94篇
  1981年   102篇
  1980年   92篇
  1979年   100篇
  1978年   95篇
  1977年   72篇
  1976年   85篇
  1975年   75篇
  1974年   70篇
  1973年   53篇
  1971年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
We examined households’ dynamic patterns of net worth accumulation between 1999 and 2009 and asked whether these patterns related to the financial health of young adults growing up in those households. Two patterns of net worth emerged—the first remained high and stable and the second experienced a precipitous decline between 2007 and 2009. Young adults who grew up in households with high and stable net worth also experienced the greatest benefit in financial health. Given wealth losses in the wake of the Great Recession and the ripple effects those losses may have had—and may continue to have—on households and their children, policies that stimulate wealth accumulation may be feasible and timely strategies for improving financial health.  相似文献   
992.
993.
994.
We study postpartum decisions about paid work and breastfeeding using a simultaneous equations model. For our sample of higher socioeconomic status mothers, we find a joint decision process for three sets of decisions modeled: work leave duration and duration of any, as well as of exclusive, breastfeeding, and daily work hours and daily breastfeedings at infant age 3 months. We find that returning to paid work 1 week earlier reduces any breastfeeding duration by about two-thirds of a week while extending breastfeeding by a week delays work participation by about one-third of a week. We find larger elasticities for decisions involving daily work hours and number of breastfeedings at 3 months than for work leave duration and any breastfeeding duration and the smallest elasticities for duration of exclusive breastfeeding and work leave. This marks the first study to find a joint decision-making process for postpartum work and breastfeeding decisions and suggests that, in addition to increased leave impacting breastfeeding behaviors, successful breastfeeding promotion policies can have nontrivial impacts on the US labor market.  相似文献   
995.
This paper examines whether receipt of public or private assistance is associated with recipients’ own generosity in the form of formal and informal volunteering. Using matched data from the 2007–2011 American Time Use Survey and the Annual Social and Economic Supplement to the Current Population Survey, this paper finds that receipt of private assistance from friends and relatives is negatively associated with the time women spend caring for non-household adults and the time men spend caring for non-household children. Receipt of public assistance is found to be negatively associated with men’s care of non-household adults. No associations are found between either type of assistance and time spent volunteering for a formal organization.  相似文献   
996.
This paper analyzes the effect of a statewide merit-based scholarship program on educational outcomes in Arizona. It tests whether Arizona’s Instrument to Measure Standards (AIMS) scholarship has an effect on a comprehensive set of educational outcomes such as the number of applicants, student admissions, first-year first-time enrollment, ACT scores of entering freshman, retention rates, as well as on the level of tuition and fees at the three schools targeted by the program; Arizona State University, University of Arizona and Northern Arizona University. Both difference-in-differences estimation as well as synthetic control methods shows that AIMS has an economically and statistically significant effect enrollment. Enrollment effects are greatest among African American and Hispanic students and are significant for both men and women. While point estimates suggest that AIMS also lead to increases in tuition and fees, these results are not robust to placebo tests.  相似文献   
997.
The probability that Mexican households receive remittances increases in response to temporary loss of employment by household heads. Evidence indicates that the probability doubles in the short-term, with a stronger effect in the first quarter of unemployment. Taking into account inter-household transfers within Mexico, the increase in the probability of private transfers is similar in households with low and high access to migratory networks in the U. S. The effectiveness of private transfers as an insurance mechanism has been reduced in an environment of economic crisis.  相似文献   
998.
This study examined gender, age, and task differences in positive touch and physical proximity during mother–child and father–child conversations. Sixty-five Spanish mothers and fathers and their 4- (M = 53.50 months, SD = 3.54) and 6-year-old (M = 77.07 months, SD = 3.94) children participated in this study. Positive touch was examined during a play-related storytelling task and a reminiscence task (conversation about past emotions). Fathers touched their children positively more frequently during the play-related storytelling task than did mothers. Both mothers and fathers were in closer proximity to their 6-year-olds than their 4-year-olds. Mothers and fathers touched their children positively more frequently when reminiscing than when playing. Finally, 6-year-olds remained closer to their parents than did 4-year-olds. Implications of these findings for future research on children’s socioemotional development are discussed.  相似文献   
999.
Although appearance-based cues can help to diagnose physical illness, visual manifestations of mental disorder may be more elusive. Here, we investigated whether individuals could distinguish women with a serious mental disorder (borderline personality disorder) from demographically- and IQ-matched non-psychiatric controls. Participants rated mentally ill targets as more likely to have a mental disorder from photos more accurately than chance, despite not believing that such judgments were possible. The configuration of facial cues played an important role in these judgments, as interfering with the spatial relationships between facial features reduced participants’ accuracy to chance guessing. Further investigation showed similar results when participants rated the targets for specific mental disorders (borderline personality disorder, major depressive disorder) and rated the mentally ill targets as more depressed, angry, anxious, disgusted, emotionally unstable, distressed, and less happy. Moreover, the depression ratings significantly correlated with the targets’ actual depressive symptoms. Thus, individuals may be able to infer aspects of mental disorder from minimal facial cues.  相似文献   
1000.
We assessed the impact of social context on the judgment of emotional facial expressions as a function of self-construal and decoding rules. German and Greek participants rated spontaneous emotional faces shown either alone or surrounded by other faces with congruent or incongruent facial expressions. Greek participants were higher in interdependence than German participants. In line with cultural decoding rules, Greek participants rated anger expressions less intensely and sad and disgust expressions more intensely. Social context affected the ratings by both groups in different ways. In the more interdependent culture (Greece) participants perceived anger least intensely when the group showed neutral expressions, whereas sadness expressions were rated as most intense in the absence of social context. In the independent culture (Germany) a group context (others expressing anger or happiness) additionally amplified the perception of angry and happy expressions. In line with the notion that these effects are mediated by more holistic processing linked to higher interdependence, this difference disappeared when we controlled for interdependence on the individual level. The findings confirm the usefulness of considering both country level and individual level factors when studying cultural differences.  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