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   6376篇
  免费   247篇
各国政治   443篇
工人农民   203篇
世界政治   639篇
外交国际关系   451篇
法律   2710篇
中国政治   50篇
政治理论   2049篇
综合类   78篇
  2023年   44篇
  2022年   29篇
  2021年   54篇
  2020年   109篇
  2019年   159篇
  2018年   177篇
  2017年   203篇
  2016年   209篇
  2015年   119篇
  2014年   176篇
  2013年   1081篇
  2012年   176篇
  2011年   182篇
  2010年   181篇
  2009年   182篇
  2008年   168篇
  2007年   228篇
  2006年   201篇
  2005年   233篇
  2004年   233篇
  2003年   212篇
  2002年   234篇
  2001年   126篇
  2000年   121篇
  1999年   100篇
  1998年   95篇
  1997年   95篇
  1996年   94篇
  1995年   95篇
  1994年   97篇
  1993年   82篇
  1992年   89篇
  1991年   93篇
  1990年   66篇
  1989年   69篇
  1988年   68篇
  1987年   66篇
  1986年   70篇
  1985年   65篇
  1984年   56篇
  1983年   66篇
  1982年   51篇
  1981年   57篇
  1980年   41篇
  1979年   41篇
  1978年   34篇
  1977年   35篇
  1976年   32篇
  1974年   16篇
  1973年   17篇
排序方式: 共有6623条查询结果,搜索用时 15 毫秒
181.
Structured analytic techniques (SATs) are intended to improve intelligence analysis by checking the two canonical sources of error: systematic biases and random noise. Although both goals are achievable, no one knows how close the current generation of SATs comes to achieving either of them. We identify two root problems: (1) SATs treat bipolar biases as unipolar. As a result, we lack metrics for gauging possible over-shooting—and have no way of knowing when SATs that focus on suppressing one bias (e.g., over-confidence) are triggering the opposing bias (e.g., under-confidence); (2) SATs tacitly assume that problem decomposition (e.g., breaking reasoning into rows and columns of matrices corresponding to hypotheses and evidence) is a sound means of reducing noise in assessments. But no one has ever actually tested whether decomposition is adding or subtracting noise from the analytic process—and there are good reasons for suspecting that decomposition will, on balance, degrade the reliability of analytic judgment. The central shortcoming is that SATs have not been subject to sustained scientific of the sort that could reveal when they are helping or harming the cause of delivering accurate assessments of the world to the policy community.  相似文献   
182.
183.
This paper investigates to what extent socioeconomic status (SES)‐based affirmative action in college admissions can produce racial diversity. Using simulation models, we investigate the racial and socioeconomic distribution of students among colleges under the use of race‐ or SES‐based affirmative action policies, or targeted, race‐based recruitment policies. We find, first, that neither SES‐based affirmative action nor race‐targeted recruiting on their own produce levels of racial diversity achieved by race‐based affirmative action. However, the two policies in combination, although likely expensive, may yield racial diversity comparable to race‐based affirmative action. Second, the use of affirmative action policies by some colleges reduces the diversity of similar‐quality colleges without such policies. Third, the combination of SES‐based affirmative action and race recruiting results in fewer academically‐overmatched Black and Hispanic students than under race‐based affirmative action, but the schools that use both also see a reduction in the academic achievement of enrolled students.  相似文献   
184.
185.
Aviation expansion and the construction of a third runway at Heathrow airport is firmly back on the political agenda. Yet, the stark fact remains that a growing list of British governments has been unable to engineer a partial or temporary policy settlement in aviation. In exploring the challenges of reaching such a settlement, this article characterises the shifting and contested political and policy contexts of UK aviation. It begins by exploring the ‘wicked issue’ of aviation expansion before foregrounding how the politics of air travel is riven by competing policy frames, fragmented governance and the absence of gatekeepers. It argues that the Davies Commission and its efforts to remove aviation from the domain of partisan politics provided little more than a temporary respite for government. It thus concludes by questioning whether the May government's expansion proposals will succeed this time around, outlining how the contributions in this collection address the themes and issues of this overriding policy puzzle.  相似文献   
186.
187.
188.
Since the 1980s the Scottish National Party has presented its political project in progressive terms, but this created a twin dilemma: in order to achieve independence, the SNP needed to win political power, and in order to achieve political power it had to win an election, and orthodoxy dictated that winning elections in Scotland involved a centre‐left platform. But the two have often been in conflict, as is clear as the SNP approaches its tenth anniversary in devolved government and agitates for another referendum.  相似文献   
189.
In federal systems, both state governments and firms have incentives to strategically locate polluting facilities where the environmental and health consequences will be borne as much as possible by residents of other jurisdictions. We analyze air polluter location in the United States using a spatial point pattern model, which models where events occur in latitude and longitude. Our analyses indicate that major air polluters are significantly more likely to be located near a state's downwind border than a control group of other industrial facilities, results that are robust to a wide variety of model specifications and measurement strategies. This effect is particularly pronounced for facilities with toxic air emissions. The observed pattern of polluter location varies systematically across states and time in ways that suggest it is responsive to public policy at both the national and state levels.  相似文献   
190.
The study of political conflict in legislatures is fundamental to understanding the nature of governance, but also difficult because of changes in membership and the issues addressed over time. Focusing on the enduring issue of civil rights in the United States since Reconstruction, we show that using current methods and measures to characterize elite ideological disagreements makes it hard to interpret or reconcile the conflicts with historical understandings because of their failure to adequately account for the policies being voted upon and the consequences of the iterative lawmaking process. Incorporating information about the policies being voted upon provides a starkly different portrait of elite conflict—not only are contemporary parties relatively less divided than is commonly thought, but the conflict occurs in a smaller, and more liberal, portion of the policy space. These findings have important implications for a broad range of work that uses elite actions to compare political conflict/polarization across time.  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