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   6864篇
  免费   207篇
  国内免费   19篇
管理学   1192篇
民族学   53篇
人才学   1篇
人口学   759篇
丛书文集   34篇
理论方法论   690篇
综合类   246篇
社会学   3255篇
统计学   860篇
  2023年   49篇
  2022年   27篇
  2021年   36篇
  2020年   103篇
  2019年   167篇
  2018年   169篇
  2017年   266篇
  2016年   234篇
  2015年   165篇
  2014年   164篇
  2013年   872篇
  2012年   369篇
  2011年   375篇
  2010年   194篇
  2009年   159篇
  2008年   180篇
  2007年   206篇
  2006年   187篇
  2005年   709篇
  2004年   437篇
  2003年   275篇
  2002年   187篇
  2001年   203篇
  2000年   128篇
  1999年   94篇
  1998年   73篇
  1997年   68篇
  1996年   56篇
  1995年   52篇
  1994年   45篇
  1993年   61篇
  1992年   55篇
  1991年   57篇
  1990年   52篇
  1989年   54篇
  1988年   51篇
  1987年   38篇
  1986年   42篇
  1985年   32篇
  1984年   53篇
  1983年   38篇
  1982年   43篇
  1981年   41篇
  1980年   38篇
  1979年   33篇
  1978年   26篇
  1977年   20篇
  1976年   21篇
  1975年   22篇
  1974年   13篇
排序方式: 共有7090条查询结果,搜索用时 333 毫秒
101.
Among policymakers, a common perception surrounding the effects of cash transfer programmes, particularly unconditional programmes targeted to families with children, is that they induce increased fertility. We evaluate the Zambian Child Grant Programme, a government unconditional cash transfer targeted to families with a child under the age of 5 and examine impacts on fertility and household composition. The evaluation was a cluster randomized control trial, with data collected over 4 years from 2010 to 2014. Our results indicate that there are no programme impacts on overall fertility. Our results contribute to a small evidence base demonstrating that there are no unintended incentives related to fertility due to cash transfers.  相似文献   
102.
Young children are extremely motivated to help others, but it is not clear whether they do so in anonymous situations without social recognition. In two studies, we found that 18‐month‐old toddlers provided help equally in situations where an adult recipient was present and in situations where an adult recipient was not present. We included several control conditions to rule out that toddlers were simply unaware of their anonymity or were merely motivated to restore the physical order of things. Together, these findings suggest that early in ontogeny children are motivated to help others in need regardless of whether they can immediately be recognized for their prosocial intentions.  相似文献   
103.
Researchers recommend the use of pictographs in medical risk communication to improve people's risk comprehension and decision making. However, it is not yet clear whether the iconicity used in pictographs to convey risk information influences individuals’ information processing and comprehension. In an eye‐tracking experiment with participants from the general population (N = 188), we examined whether specific types of pictograph icons influence the processing strategy viewers use to extract numerical information. In addition, we examined the effect of iconicity and numeracy on probability estimation, recall, and icon liking. This experiment used a 2 (iconicity: blocks vs. restroom icons) × 2 (scenario: medical vs. nonmedical) between‐subject design. Numeracy had a significant effect on information processing strategy, but we found no effect of iconicity or scenario. Results indicated that both icon types enabled high and low numerates to use their default way of processing and extracting the gist of the message from the pictorial risk communication format: high numerates counted icons, whereas low numerates used large‐area processing. There was no effect of iconicity in the probability estimation. However, people who saw restroom icons had a higher probability of correctly recalling the exact risk level. Iconicity had no effect on icon liking. Although the effects are small, our findings suggest that person‐like restroom icons in pictographs seem to have some advantages for risk communication. Specifically, in nonpersonalized prevention brochures, person‐like restroom icons may maintain reader motivation for processing the risk information.  相似文献   
104.
We experimentally compare fast and slow decisions in a series of experiments on financial risk taking in three countries involving over 1700 subjects. To manipulate fast and slow decisions, subjects were randomly allocated to responding within 7 seconds (time pressure) or waiting for at least 7 or 20 seconds (time delay) before responding. To control for different effects of time pressure and time delay on measurement noise, we estimate separate parameters for noise and risk preferences within a random utility framework. We find that time pressure increases risk aversion for gains and risk taking for losses compared to time delay, implying that time pressure increases the reflection effect of Prospect Theory. The results for gains are weaker and less robust than the results for losses. We find no significant difference between time pressure and time delay for loss aversion (tested in only one of the experiments). Time delay also leads to less measurement noise than time pressure and unconstrained decisions, and appears to be an effective way of decreasing noise in experiments.  相似文献   
105.
106.
107.
108.
Welfare state studies are usually motivated by one or both of two concerns: programme effects on the incidence of poverty, and the possibility of perverse incentive effects. Most research has been comparative, using cross‐national indicators from the Organisation for Economic Co‐operation and Development and other international organizations. That research often contrasts the generosity of programmes in a number of European countries and the lack of it in the USA. Focusing on income transfers after job‐loss, in this article we critically examine the comparative evidence on US welfare state generosity and then use the Panel Study of Income Dynamics (PSID) to estimate what happens to job‐losers' incomes. The comparative analysis suggests conclusions more nuanced than found in much of the literature. The PSID analysis shows how the income effects of job‐loss vary across job‐losers and suggests that the role of unemployment compensation programmes in supporting incomes may be overstated.  相似文献   
109.
We used the 2008 National Study of the Changing Workforce to investigate the effects of shift work on individuals. We investigated if shift workers would have poorer work to family fit than workers with regular day schedules or flexible schedules. We also investigated if control of work schedule would moderate the possible negative effects of shift work. Results indicate that shift work is associated with increased work to family conflict, especially for women. In addition, the results indicate that women have greater work to family conflict compared to men when workers have more work schedule control. Implications of the findings are discussed.  相似文献   
110.
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