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   2191篇
  免费   63篇
各国政治   189篇
工人农民   95篇
世界政治   248篇
外交国际关系   180篇
法律   945篇
中国政治   25篇
政治理论   561篇
综合类   11篇
  2023年   7篇
  2022年   7篇
  2021年   11篇
  2020年   28篇
  2019年   38篇
  2018年   55篇
  2017年   63篇
  2016年   63篇
  2015年   51篇
  2014年   56篇
  2013年   366篇
  2012年   43篇
  2011年   67篇
  2010年   56篇
  2009年   79篇
  2008年   63篇
  2007年   66篇
  2006年   65篇
  2005年   51篇
  2004年   89篇
  2003年   62篇
  2002年   55篇
  2001年   42篇
  2000年   51篇
  1999年   37篇
  1998年   48篇
  1997年   43篇
  1996年   29篇
  1995年   38篇
  1994年   39篇
  1993年   46篇
  1992年   27篇
  1991年   27篇
  1990年   28篇
  1989年   27篇
  1988年   28篇
  1987年   28篇
  1986年   24篇
  1985年   54篇
  1984年   44篇
  1983年   37篇
  1982年   11篇
  1981年   18篇
  1980年   19篇
  1979年   8篇
  1977年   10篇
  1976年   10篇
  1975年   4篇
  1974年   5篇
  1973年   6篇
排序方式: 共有2254条查询结果,搜索用时 0 毫秒
271.
272.
273.
274.
275.
276.
277.
278.
David M. Konisky Department of Political Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room E53-386, Cambridge, MA 02139 e-mail: sda{at}mit.edu e-mail: konisky{at}mit.edu (corresponding author) Studies of voter turnout across states find that those withmore facilitative registration laws have higher turnout rates.Eliminating registration barriers altogether is estimated toraise voter participation rates by up to 10%. This article presentspanel estimates of the effects of introducing registration thatexploits changes in registration laws and turnout within states.New York and Ohio imposed registration requirements on all oftheir counties in 1965 and 1977, respectively. We find thatthe introduction of registration to counties that did not previouslyrequire registration decreased participation over the long termby three to five percentage points. Though significant, thisis lower than estimates of the effects of registration fromcross-sectional studies and suggests that expectations aboutthe effects of registration reforms on turnout may be overstated.  相似文献   
279.
  • This paper explores the institutional and political dynamics of the Business Council of Australia (BCA), a unique form of big business association which relies on the active involvement of its one hundred or so CEO members. The paper argues that associations such as the BCA confront a range of serious institutional problems in their attempts to wield political power, or more modestly perhaps, policy influence. First, they confront a disconnect between ‘structural’ and ‘instrumentalist’ articulations of business power. The key source of business power resides in business control over the economy and the investment process, a form of power wielded at the company level not at the level of business associations. When engaged in instrumentalist or overt forms of political activism, the BCA also confronts serious collective action problems. It is also argued that the influence of the BCA seems to have declined over time and that this can partly be traced back to declining CEO commitment rooted in changing institutional and structural dynamics in the corporate world.
Copyright © 2006 John Wiley & Sons, Ltd.  相似文献   
280.
Age-related changes of arachnoid foveae have been described, but objective, quantitative analyses are lacking. A new quantitative method is presented for estimation of change in total volume of arachnoid foveae with age. The pilot sample consisted of nine skulls from the Palmer Anatomy Laboratory. Arachnoid foveae were filled with sand, which was extracted using a vacuum pump. Mass was determined with an analytical balance and converted to volume. A reliability analysis was performed using intraclass correlation coefficients. The method was found to be highly reliable (intraobserver ICC = 0.9935, interobserver ICC = 0.9878). The relationship between total volume and age was then examined in a sample of 63 males of accurately known age from the Hamann-Todd collection. Linear regression analysis revealed no statistically significant relationship between total volume and age, or foveae frequency and age (alpha = 0.05). Development of arachnoid foveae may be influenced by health factors, which could limit its usefulness in aging.  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