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   967篇
  免费   50篇
各国政治   40篇
工人农民   60篇
世界政治   71篇
外交国际关系   76篇
法律   465篇
中国政治   20篇
政治理论   279篇
综合类   6篇
  2023年   12篇
  2022年   6篇
  2021年   5篇
  2020年   18篇
  2019年   42篇
  2018年   43篇
  2017年   41篇
  2016年   38篇
  2015年   33篇
  2014年   36篇
  2013年   122篇
  2012年   46篇
  2011年   46篇
  2010年   28篇
  2009年   38篇
  2008年   26篇
  2007年   29篇
  2006年   37篇
  2005年   23篇
  2004年   33篇
  2003年   25篇
  2002年   30篇
  2001年   23篇
  2000年   12篇
  1999年   25篇
  1998年   8篇
  1997年   11篇
  1996年   8篇
  1995年   14篇
  1994年   8篇
  1993年   6篇
  1992年   9篇
  1991年   7篇
  1990年   10篇
  1989年   13篇
  1988年   10篇
  1987年   8篇
  1986年   10篇
  1985年   5篇
  1984年   5篇
  1983年   6篇
  1982年   5篇
  1981年   6篇
  1979年   8篇
  1978年   6篇
  1977年   4篇
  1971年   3篇
  1970年   3篇
  1968年   5篇
  1966年   3篇
排序方式: 共有1017条查询结果,搜索用时 31 毫秒
1.
2.
3.
In 1997, the Office of Child Support Enforcement initiated the State Child Access and Visitation (AV) Grant Program, which involves annual awards of $10 million to states to promote the development of programs to alleviate access problems. Telephone interviews with 970 parents who used mediation, parent education, and supervised visitation programs funded by AV grants in nine states revealed that the programs are reaching diverse groups of parents including many low-income, non-White, and unmarried parents who receive no other type of access assistance. The programs also appear to be achieving the major objectives posited for them by the federal government. One-third to one-half of noncustodial parents in every program type reported that parent–child contact increased following program participation, with supervised visitation users who typically had the lowest levels of parent–child contact reporting a significant increase in the number of days of contact. A review of child support records for 173 program users in three states revealed that child support payments increased among participants following program participation, especially for never-married parents who paid a significantly higher proportion of what they owed. These findings are similar to results reported in a five-state study of mediation programs funded by AV grants that was conducted by the Office of the Inspector General. However, both studies have some serious limitations, including low response rates and the absence of a nontreatment comparison group.  相似文献   
4.
Development debates have been greatly influenced by the growth consensus: the conventional wisdom that economic growth should be the primary priority for less-developed countries (LDCs) because it most effectively improves the well-being of the world’s poor. We compare the impact of growth to other independent variables in an unbalanced panel analysis of up to 109 LDCs and 580 observations across six time points (1980, 1985, 1990, 1995, 2000, and 2003). Our dependent variables include caloric consumption, infant survival probability, one-to-five year survival probability, female life expectancy, and male life expectancy. First, we find that gross domestic product (GDP) has significant positive effects on caloric consumption, female life expectancy, and male life expectancy. Second, GDP does not have robust effects on infant and one-to-five survival probabilities. Third, fertility, urbanization, and secondary school enrollment have larger effects than GDP in the majority of models. The more powerful effects of fertility, urbanization, and secondary schooling cannot simply be attributed to an indirect effect of GDP. Fourth, we find that dependency variables do not have robust significant effects. Fifth, over time, GDP has become much less effective at improving caloric consumption and infant and one-to-five survival. We infer that there are serious limitations to concentrating exclusively on economic growth to improve well-being in LDCs.  相似文献   
5.
6.
7.
8.
This is an examination of whether city size is truly an independent variable when the relationships between city size and certain economic and social phenomena are considered. A new hypothesis is presented that postulates that relative or systemic city size is an independent variable that affects urban growth patterns through varying, non-optimum migration flows. The hypothesis is tested using official Mexican data for the period 1960 to 1970.  相似文献   
9.
10.
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