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   14880篇
  免费   449篇
各国政治   440篇
工人农民   733篇
世界政治   837篇
外交国际关系   450篇
法律   9864篇
中国共产党   34篇
中国政治   169篇
政治理论   2650篇
综合类   152篇
  2021年   91篇
  2020年   194篇
  2019年   179篇
  2018年   353篇
  2017年   344篇
  2016年   431篇
  2015年   307篇
  2014年   304篇
  2013年   1126篇
  2012年   438篇
  2011年   463篇
  2010年   289篇
  2009年   376篇
  2008年   427篇
  2007年   426篇
  2006年   437篇
  2005年   737篇
  2004年   470篇
  2003年   343篇
  2002年   329篇
  2001年   517篇
  2000年   441篇
  1999年   361篇
  1998年   188篇
  1997年   158篇
  1996年   173篇
  1995年   162篇
  1994年   172篇
  1993年   180篇
  1992年   286篇
  1991年   339篇
  1990年   297篇
  1989年   281篇
  1988年   314篇
  1987年   295篇
  1986年   327篇
  1985年   309篇
  1984年   255篇
  1983年   241篇
  1982年   142篇
  1981年   157篇
  1980年   123篇
  1979年   141篇
  1978年   127篇
  1977年   101篇
  1975年   103篇
  1974年   122篇
  1973年   110篇
  1971年   93篇
  1970年   83篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
201.
202.
The authors reviewed at autopsy the causes of death of 274 patients with evidence of intravenous drug abuse who had been admitted to a large public hospital. There were 127 who died from diseases unrelated to intravenous drug abuse, and in 41% of these, chronic alcoholism was implicated. Deaths from overdose syndromes and drug-related organ pathology comprised only 11% of all cases. The mean age at death was 39 years. There was a male/female ratio of 3.6:1. Half of all patients died from infection--72 from acquired immunodeficiency syndrome (AIDS) alone. These findings indicate that persons hospitalized with a history of intravenous drug abuse usually die from causes other than overdose and that AIDS and chronic alcoholism are significant problems. Emphasis should be placed upon detecting "hidden" intravenous drug deaths to provide more accurate statistical information.  相似文献   
203.
204.
The political feasibility of protectionist policies that regulate international industry derives from the absence of overt collusion among domestic import-competing producers. The regulation of international industry cannot be explicit since governments would thereby be perceived to be approving (or instigating) international collusion. Hence, voluntary export restraints have been popularly presented with a focus on the difficulties confronted by domestic import-competing producers and a de-emphasis on the mutual gains to domestic and foreign producers from monitoring by a foreign government of a restrictive export cartel arrangement. Similarly, trigger-price mechanisms have popularly been explained in terms of the need for anti-dumping measures to preserve fair competition. Likewise, the involuntary export tax derived in the first instance from an administratively validated (but, as demonstrated by Kalt's econometric analysis, contentious) complaint of unfair foreign competition. Voluntary export restraints, trigger-price mechanisms, and involuntary export taxes are however protectionist devices, the beneficiaries of which can transcend national jurisdictions, and which have in common the characteristic that the gains to domestic industry interests derive from the regulation of foreign competitors.A previous version of this paper was presented at a conference on Economics and Power organized by the FWS Institute of Zug and held at Interlaken, Switzerland in July 1988.  相似文献   
205.
This paper departs from the Tullock cost paradigm that views competition for monopoly privilege as a welfare-inimical process that wastefully dissipates preexisting producers' surplus and, occasionally, leads to inefficient increases in costs and counterproductive uses of scarce resources. The potential availability of rent-seeking may bring about the elimination of inefficient regulatory regimes that retard or prevent the introduction of cost-reducing innovations. Air quality management is but one area in which innovation rent-seeking holds promise for concrete welfare gains. Researchers may wish to focus on institutional mechanisms designed to overcome the transactions costs and free rider disincentives to the formation of a coalition to seek innovation rents. An example of such a mechanism might be a joint venture that requires all venture members to engage in lobbying and to contribute to collective research efforts. These unaddressed questions await future research.The authors are grateful for the insightful comments of Gordon Tullock, Robert D. Tollison, Michael T. Marlow and J.R. Clark. The usual caveats apply. The views expressed herein are solely those of the authors and should not be taken to represent the views of their employers.  相似文献   
206.
207.
208.
Gibbs N 《Time》1993,142(15):26-29
  相似文献   
209.
210.
Over the past decade, there has been an explosion of litigation addressing an employer's right to unilaterally amend or terminate medical benefits provided to retirees. The sheer volume of these cases and the variety of facts and legal theories have combined to obscure the patterns and trends that actually are emerging from this litigation. This article will describe the context of the struggle over retiree benefits and discuss those leading decisions in which the federal courts of appeals have established their rules for deciding retiree benefits cases.  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