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   8229篇
  免费   126篇
  国内免费   1篇
管理学   1108篇
民族学   29篇
人口学   714篇
丛书文集   31篇
理论方法论   700篇
综合类   136篇
社会学   3713篇
统计学   1925篇
  2020年   116篇
  2019年   173篇
  2018年   167篇
  2017年   260篇
  2016年   176篇
  2015年   155篇
  2014年   183篇
  2013年   1528篇
  2012年   248篇
  2011年   201篇
  2010年   186篇
  2009年   159篇
  2008年   227篇
  2007年   225篇
  2006年   185篇
  2005年   159篇
  2004年   137篇
  2003年   131篇
  2002年   147篇
  2001年   185篇
  2000年   163篇
  1999年   149篇
  1998年   128篇
  1997年   130篇
  1996年   125篇
  1995年   110篇
  1994年   84篇
  1993年   128篇
  1992年   137篇
  1991年   120篇
  1990年   131篇
  1989年   110篇
  1988年   106篇
  1987年   111篇
  1986年   100篇
  1985年   84篇
  1984年   116篇
  1983年   98篇
  1982年   94篇
  1981年   64篇
  1980年   94篇
  1979年   106篇
  1978年   72篇
  1977年   82篇
  1976年   70篇
  1975年   85篇
  1974年   70篇
  1973年   54篇
  1972年   61篇
  1971年   52篇
排序方式: 共有8356条查询结果,搜索用时 0 毫秒
631.
In five Lincolnshire villages between 1252 and 1478 there is evidence that men and women married fairly late before the Black Death, and that by 1348/9 the Western European marriage pattern of late and prudential marriage was well established. Households were usually nucleated; husbands were on average eight years older than their wives before 1348/9, and five years older after 1348/9. Marriages were short: according to the best calculation shorter before 1348/9 than after, most often terminated by the death of the first husband, and were unlikely to produce more than three children. Since there were more males than females amongst children and young adults, many men remained unmarried, but since the death rate of women was very high, men lived longer.  相似文献   
632.
This study uses a regression analysis to explore the cross‐country variation in homicide rates for a large sample of countries. It starts by identifying seven significant regional variables, to which traditional socioeconomic, cultural, and institutional variables are added and tested. The importance of institutions, culture, and other factors affecting homicide rates is discussed. One unexpected finding is a curious relationship between the level of education and homicide rates: while an increase in male education tends to reduce homicide rates, an increase in female education tends to increase homicides. Several possible interpretations for this phenomenon are proposed. The study points to relatively unexplored areas of research in order to better understand homicide variation around the world.  相似文献   
633.
634.
The purpose of this paper is to examine the relative importance of access to family planning and the motivation to restrict fertility in determining contraceptive use in three countries that have led the fertility transitions in their regions: Colombia, Tunisia, and Zimbabwe. A structural equations model is estimated where endogenous fertility intentions are allowed to affect contraceptive method use. Simulation methods are then used to quantify the size of the impact of intentions and access on method choice for the three countries. The results demonstrate that even after controlling for fertility intentions, family planning program variables still have important effects in all three countries.  相似文献   
635.
Extract

I have suggested that at a given birth order the probability of having a further pregnancy is greater when the last pregnancy had been spontaneously aborted than when it resulted in a birth.2 Léridon,3in the course of a valuable paper on foetal wastage, presents data which, according to him, impugn my suggestion. I would like to question his claim.  相似文献   
636.
637.
There is increasing evidence that positive interventions enhance well-being, although benefits for individuals will partly depend on the congruence between their unique characteristics and the requirements of an intervention. In this study, dispositional mindfulness was examined as a potential moderator of the efficacy of two interventions: three good things and best possible selves. These interventions were expected to increase positive affect and mental well-being and decrease negative affect, and it was hypothesised that participants high on mindfulness would benefit most. In an online randomised controlled trial, 211 participants (159 women, 52 men, M age = 34.00 years) completed baseline measures of well-being and mindfulness, and were randomly assigned into a 7-day intervention or a no-activity control group. Results from 73 participants who completed Time 2 indicated that best possible selves significantly lowered negative affect, with a medium effect size. Follow-up data from 37 participants 2 weeks later indicated that for participants with lower initial mindfulness, those allocated to the best possible selves group experienced increased positive affect, with a large effect size. Motivation to do the assigned intervention was strongly and positively associated with practice, and both motivation and frequency were strongly related to increased mental well-being. These results provide additional support for the efficacy of the best possible selves intervention and indicate that it can be beneficial for individuals with low levels of dispositional mindfulness.  相似文献   
638.
Over the period 1990–2010, the increase in life expectancy for males in New York City was 6.0 years greater than for males in the United States. The female relative gain was 3.9 years. Male relative gains were larger because of extremely rapid reductions in mortality from HIV/AIDS and homicide, declines that reflect effective municipal policies and programs. Declines in drug‐ and alcohol‐related deaths also played a significant role in New York City's advance, but every major cause of death contributed to its relative improvement. By 2010, New York City had a life expectancy that was 1.9 years greater than that of the US. This difference is attributable to the high representation of immigrants in New York's population. Immigrants to New York City, and to the United States, have life expectancies that are among the highest in the world. The fact that 38 percent of New York's population consists of immigrants, compared to only 14 percent in the United States, accounts for New York's exceptional standing in life expectancy in 2010. In fact, US‐born New Yorkers have a life expectancy below that of the United States itself.  相似文献   
639.
This exploratory qualitative study examined the roles of religiousness in the lives of 21 older women (mean age = 63) serving life sentences in one southern state. Based on survey and focus group methodology, several themes emerged as important focal points, including early religious experiences prior to incarceration, imprisonment and religious doubt, participation in formal and informal religious activities, and use of religion in coping with stressors such as interpersonal relationships, trauma, and health statuses. Irrespective of their religious upbringing, all participants agreed that religiosity/spirituality played a key role in their ability to cope with their prison experience as well as for maintaining hope and the opportunity for release.  相似文献   
640.
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