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   21102篇
  免费   397篇
各国政治   1007篇
工人农民   1393篇
世界政治   1219篇
外交国际关系   989篇
法律   11493篇
中国共产党   1篇
中国政治   65篇
政治理论   5170篇
综合类   162篇
  2021年   87篇
  2020年   166篇
  2019年   235篇
  2018年   1501篇
  2017年   1482篇
  2016年   1301篇
  2015年   287篇
  2014年   309篇
  2013年   1793篇
  2012年   541篇
  2011年   1227篇
  2010年   1273篇
  2009年   883篇
  2008年   1060篇
  2007年   1046篇
  2006年   376篇
  2005年   424篇
  2004年   540篇
  2003年   506篇
  2002年   404篇
  2001年   424篇
  2000年   396篇
  1999年   316篇
  1998年   179篇
  1997年   205篇
  1996年   184篇
  1995年   193篇
  1994年   204篇
  1993年   157篇
  1992年   237篇
  1991年   255篇
  1990年   216篇
  1989年   233篇
  1988年   209篇
  1987年   205篇
  1986年   234篇
  1985年   187篇
  1984年   181篇
  1983年   197篇
  1982年   128篇
  1981年   129篇
  1980年   94篇
  1979年   152篇
  1978年   101篇
  1977年   102篇
  1976年   86篇
  1975年   79篇
  1974年   96篇
  1973年   90篇
  1972年   81篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
81.
82.
83.
The Tax Reform Act of 1986 rewrote the federal income tax code, bringing it closer to policy professionals' vision of what constitutes an equitable and efficient income tax. Research on tax compliance suggests the law might have affected taxpayer compliance in three ways: by reducing opportunities to overstate deductions, by changing perceptions of fairness, and by altering tax liabilities. Changes in taxpayer perceptions, attitudes, and noncompliance intentions were examined in three bodies of survey data, each containing pre-and post-reform data from independent samples of the same population. The results show an improved normative climate for taxpayer compliance and point to both the feasibility and the importance of examining the effects of substantive tax policies on taxpayer perceptions, attitudes, and behavioral intentions.  相似文献   
84.
85.
The formation of adequate mental health systems within prisons has accelerated as a result of successful class action lawsuits. Our recent national survey questioned all state correctional departments about the existence of standards in each system, compliance with such standards, prevalence of class action lawsuits involving the issue of providing adequate mental health services for inmates, issues related to consent decrees, available mental health resources within the correctional system, and the administrative structure of the mental health system. Our purpose was to identify those factors correlated with certified class action lawsuits involving issues related to mental health services. Twenty-one states were involved in such litigation. Only the presence of psychiatric hospitals operated by the department of corrections correlated with the presence of certified class action lawsuits involving mental health services. Prison systems larger than 15,000 inmates were at higher risk for such litigation. Smaller systems having psychiatric hospitals run by the state mental health agency appeared to be at less risk for such litigation.  相似文献   
86.
The Green River Murder Investigation in King County, Washington, is currently the longest active serial murder investigation in U.S. history. During its course, over 26 separate scenes with from one to five victims each have been processed. The experience of the authors is presented in order to acquaint other agencies with techniques of outdoor scene processing that have evolved during recovery of remains from Green River and other skeletal cases.  相似文献   
87.
88.
89.
90.
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   
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