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   16988篇
  免费   449篇
各国政治   694篇
工人农民   660篇
世界政治   1410篇
外交国际关系   576篇
法律   10202篇
中国共产党   2篇
中国政治   75篇
政治理论   3645篇
综合类   173篇
  2020年   208篇
  2019年   248篇
  2018年   321篇
  2017年   385篇
  2016年   411篇
  2015年   286篇
  2014年   329篇
  2013年   1642篇
  2012年   402篇
  2011年   425篇
  2010年   339篇
  2009年   377篇
  2008年   438篇
  2007年   458篇
  2006年   438篇
  2005年   388篇
  2004年   392篇
  2003年   413篇
  2002年   374篇
  2001年   676篇
  2000年   614篇
  1999年   504篇
  1998年   283篇
  1997年   241篇
  1996年   202篇
  1995年   203篇
  1994年   243篇
  1993年   217篇
  1992年   335篇
  1991年   367篇
  1990年   325篇
  1989年   343篇
  1988年   316篇
  1987年   332篇
  1986年   336篇
  1985年   330篇
  1984年   284篇
  1983年   316篇
  1982年   254篇
  1981年   237篇
  1980年   179篇
  1979年   246篇
  1978年   165篇
  1977年   144篇
  1976年   130篇
  1975年   120篇
  1974年   135篇
  1973年   117篇
  1972年   112篇
  1971年   94篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
912.
COSSA is the advocate in Washington for the social and behavioral sciences. He also chairs the Coalition for National Science Funding. He has testified before Congress many times and has written and spoken extensively on legislative-executive relations, the federal budget process and science policy, particularly as it affects the social and behavioral sciences. This report was prepared by the author with the assistance of the COSSA staff.  相似文献   
913.
Among the best-known theorems of fiscal federalism is the presumed allocative and distributive equivalence between a lump-sum grant to a collectivity and a set of lump sum grants to the members of a collectivity. Interestingly, the simple elegance of the theorem is at odds with observed behavior. Grants to governments produce greater public spending than does tax reduction. Explanations of this "flypaper effect" range from misspecified econometric modeling to presumed behavior based on fiscal illusion. In this paper we show that theoretical equivalence exists in a model that recognizes only one tax share, the citizen voter's local tax share. When the model is expanded to include voters' federal tax shares as well as local taxes, non-equivalence and the flypaper effect become the rule, not the exception.  相似文献   
914.
Smoking bans are gaining widespread support in the United States and other countries. While supporters argue that bans are necessary to resolve market failures associated with negative externalities, the Coase Theorem predicts that, under various conditions, private markets internalize negative externalities. We examine the smoking issue within the framework of the Coase Theorem and hypothesize that smoking bans misallocate air space resources shared by smokers and nonsmokers. Because smoking bans shift ownership of scarce resources, they are also hypothesized to transfer income from one party (smokers) to another party (nonsmokers). Supporting evidence for these hypotheses is provided by an examination of a comprehensive smoking ban imposed in San Luis Obispo, CA.  相似文献   
915.
This paper analyzes an exchange rate policy game between a central bank and rational speculators under symmetric information. The central bank tries to counteract shocks to the exchange rate by means of sterilized intervention working through the expectations channel. Private speculators resist being fooled. They anticipate the interventions. An “intervention bias” results with an inefficiently high equilibrium volume of intervention which does not reduce the impact of shocks to the exchange rate. The model implies that the more independent the central bank the smaller and the more consistent the intervention efforts. An empirical illustration lends some support to the model.  相似文献   
916.
Concerns about U.S. competitiveness have increasingly focused the attention of policymakers on the workforce and mechanisms that could be used to enhance both the quality and quantity of human capital in the workplace. This article focuses on basic skills education of hourly workers, precisely the type of human capital which is likely to be most underprovided by the private market. Five questions are addressed: First, what is the nature of workplace education programs? Second, why do some firms provide workplace education programs while others do not? Third, what, if any, characteristics distinguish those firms that provide workplace education programs from seemingly comparable firms that do not? Fourth, what, if any, evidence can be found identifying the effects of these programs on the firms that sponsor them? Fifth, what policies appear most likely to stimulate additional workplace education?  相似文献   
917.
918.
919.
920.
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