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   8771篇
  免费   268篇
各国政治   426篇
工人农民   307篇
世界政治   728篇
外交国际关系   352篇
法律   4899篇
中国共产党   1篇
中国政治   89篇
政治理论   2160篇
综合类   77篇
  2020年   100篇
  2019年   126篇
  2018年   200篇
  2017年   193篇
  2016年   188篇
  2015年   148篇
  2014年   176篇
  2013年   1078篇
  2012年   193篇
  2011年   233篇
  2010年   197篇
  2009年   205篇
  2008年   229篇
  2007年   238篇
  2006年   258篇
  2005年   217篇
  2004年   220篇
  2003年   225篇
  2002年   198篇
  2001年   249篇
  2000年   205篇
  1999年   185篇
  1998年   128篇
  1997年   117篇
  1996年   90篇
  1995年   101篇
  1994年   101篇
  1993年   111篇
  1992年   142篇
  1991年   171篇
  1990年   153篇
  1989年   163篇
  1988年   156篇
  1987年   191篇
  1986年   158篇
  1985年   180篇
  1984年   153篇
  1983年   159篇
  1982年   118篇
  1981年   107篇
  1980年   100篇
  1979年   110篇
  1978年   98篇
  1977年   77篇
  1976年   81篇
  1975年   81篇
  1974年   83篇
  1973年   83篇
  1972年   67篇
  1969年   62篇
排序方式: 共有9039条查询结果,搜索用时 15 毫秒
971.
In American jurisprudence, two justifications have traditionally been put forth to support the government's social control of persons with mental illness: police power and parens patriae. As public mental hospitals became less available as loci in which to exercise these functions, governments sought alternative means to achieve the same ends. One prominent but quite controversial means is involuntary outpatient treatment (IOT). While the concerns about IOT have been myriad, one often alluded to but never documented is that of “net-widening.” That is, once IOT became available, it would be applied to an ever greater number of individuals, progressively expanding the margins of the designated population to whom it is applied, despite the formal standard for its application remaining constant. We tested the net-widening belief in a naturalistic experiment in Massachusetts. We found that net-widening did not occur, despite an environment strongly conducive to that expansion. At this time, whatever the arguments against IOT might be, net-widening should not be one of them.  相似文献   
972.
Regression analysis is used to test the effects of funding source (and of various control variables) on the importance of the article, as measured by the number of citations that the article receives. Funding source is measured by the number of private and the number of government grants mentioned in the acknowledgements section. The importance of an article is measured by an “early” count (of citations through October 1992), and a “late” count (of citations through July 2002). Using either measure of article importance, the evidence suggests that private funders are more successful than the government at identifying important research. Jel classification D 780 . H 110 . O 310  相似文献   
973.
974.
This study examines whether offering sex education to young teenagers affects several measures of adolescent sexual behavior and health: virginity status, contraceptive use, frequency of intercourse, likelihood of pregnancy, and probability of contracting a sexually transmitted disease. Using data from the National Longitudinal Study of Adolescent Health, I find that while sex education is associated with adverse health outcomes, there is little evidence of a causal link after controlling for unobserved heterogeneity via fixed effects and instrumental variables. These findings suggest that those on each side of the ideological debate over sex education are, in a sense, both correct and mistaken. Opponents are correct in observing that sex education is associated with adverse health outcomes, but are generally incorrect in interpreting this relationship causally. Proponents are generally correct in claiming that sex education does not encourage risky sexual activity, but are incorrect in asserting that investments in typical school-based sex education programs produce measurable health benefits.  相似文献   
975.
976.
This paper adapts a simple model from the optimal contracting literature to explain the relationship between political parties and non-incumbent candidates. The model predicts that legislators with a higher opportunity cost of government service will receive better committee assignments. Using data that spans 12 Congresses (97th to 108th), I find that when the opportunity cost of Senate service is measured by previous occupation, freshmen senators with a high opportunity cost for serving (those who were lawyers) were given good committee assignments, while freshmen senators with a low opportunity cost for serving (professors, and those with relatives already in politics) were given worse committee assignments.  相似文献   
977.
978.
Studies of involuntary outpatient commitment (OPC) among persons with severe mental illness have concluded that OPC is only effective in improving treatment outcomes when it is sustained for 6 months or longer and is combined with frequent outpatient services. This article explores factors that influence the delivery of outpatient services to subjects in a randomized trial of OPC and finds 2 general patterns. Outpatient visits were more frequent among all subjects with apparent clinical need, regardless of study assignment, and among subjects whose OPC was sustained beyond an initial court order. These results suggest that, in practice, sustained OPC represents a consensual agreement between clinicians and the court to more intensively address the complex needs of persons with severe and persistent mental illness.  相似文献   
979.
Our inquiry is the first phase of a project designed to explore systematically whether individuals are becoming more equipped to play a central role in world affairs. It hypothesizes that individuals have undergone a skill revolution, leading them to be more analytically competent, emotionally capable, and politically effective in assessing events, developing alternatives, and executing effective political action. The first phase is confined to the skills of elites: we tested the predicted generational changes by analyzing the skills of three types of individuals—elected officials in the U.S. Congress, witnesses at congressional hearings, and contributors to the daily press in three countries—in two widely separated epochs as they evaluated events across three issue areas—foreign affairs, international trade, and human rights. In doing so we randomly selected nearly one thousand paragraph-sized statements and coded them according to the methodology prescribed by the Integrative Complexity Coding Manual. All in all, our findings supported the hypothesis: the skill level of the sampled individuals was found to have increased over several generations by a statistically significant (P < .001) average greater than 10 percent. Each issue area also showed gains in the same direction between the two epochs and across all types of elites; and all of these results also met the 95 percent confidence level for statistical significance. Inasmuch as this finding does not negate the possibility of a long-term trend toward more capable publics, it points to the need for further research into the dynamics whereby world politics may become increasingly sensitive to demands at the micro level.  相似文献   
980.
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