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   19134篇
  免费   330篇
各国政治   698篇
工人农民   1399篇
世界政治   946篇
外交国际关系   604篇
法律   11442篇
中国共产党   1篇
中国政治   73篇
政治理论   4209篇
综合类   92篇
  2020年   122篇
  2019年   178篇
  2018年   1435篇
  2017年   1383篇
  2016年   1217篇
  2015年   238篇
  2014年   222篇
  2013年   1092篇
  2012年   403篇
  2011年   1146篇
  2010年   1186篇
  2009年   822篇
  2008年   988篇
  2007年   945篇
  2006年   288篇
  2005年   329篇
  2004年   421篇
  2003年   404篇
  2002年   291篇
  2001年   433篇
  2000年   383篇
  1999年   306篇
  1998年   186篇
  1997年   150篇
  1996年   164篇
  1995年   164篇
  1994年   166篇
  1993年   151篇
  1992年   240篇
  1991年   259篇
  1990年   247篇
  1989年   258篇
  1988年   242篇
  1987年   228篇
  1986年   266篇
  1985年   259篇
  1984年   243篇
  1983年   223篇
  1982年   159篇
  1981年   132篇
  1980年   115篇
  1979年   163篇
  1978年   97篇
  1977年   122篇
  1976年   97篇
  1975年   74篇
  1974年   90篇
  1973年   87篇
  1972年   81篇
  1971年   71篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
841.
Research shows protective factors that mitigate risks for juvenile delinquency can also support the community reentry of incarcerated youths and deter future offending. Family engagement, educational attainment, and secure employment are widely accepted as important protective factors to prevent problematic behavior. Studies suggest these same protective factors are crucial for incarcerated youths and should be an integral part of reentry planning to improve post-release outcomes. Nevertheless, limited research exists on the association between these factors and the value of family involvement in reentry planning for incarcerated youths. This study addresses this gap by examining how increased family contact affects the likelihood of instituting education and employment reentry plans among youths in custody. Data were obtained from the Survey of Youth in Residential Placement (SYRP) that provides information on juvenile offenders in confinement. The SYRP is the first nationally representative cross-sectional survey to gather information directly from youths 10–20 years old in custody (N=7,073). Analyses were conducted using a sequence of regression models to test the relationship between the frequency of family contact and whether a youth had a plan for education or employment upon release. Results reflect that youths with increased family contact were one and a half times more likely to have both educational and employment reentry plans in place relative to youths with no family contact. Findings inform practice and policy to advocate for family involvement with youth in confinement, and further suggest that family plays a decisive role in preparing incarcerated youths for success upon release.  相似文献   
842.
This piece contains slightly revised remarks made at the conference honoring Keith T. Poole held at the University of Georgia in May, 2017. Poole’s major contributions are summarized.  相似文献   
843.
David Ronayne 《Public Choice》2018,176(3-4):389-403
In the classic Hotelling–Downs model of political competition, no pure strategy equilibrium with three or more strategic candidates exists when the distribution of voters’ preferred policies is unimodal. I study the effect of introducing two idealist candidates to the model who are non-strategic (i.e., fixed to their policy platforms), while allowing for an unlimited number of strategic candidates. Doing so, I show that equilibrium is restored for a non-degenerate set of unimodal distributions. In addition, the equilibria have the following features: (1) the left-most and right-most candidates (i.e., extremists) are idealists; (2) strategic candidates never share their policy platforms, which instead are spread out across the policy space; and (3) if more than one strategic candidate enters, the distribution of voter preferences must be asymmetric. I also show that equilibria can accommodate idealist fringes of candidates toward the extremes of the political spectrum.  相似文献   
844.
Scaling methods pioneered by Poole and Rosenthal (Am J Polit Sci 29(2):357–384, 1985) redefined how scholars think about and estimate the ideologies of representatives seated in the US Congress. Those methods also have been used to estimate citizens’ ideologies. Whereas studies evaluating Congress typically use a behavioral measure, roll call votes, to estimate where representatives stand on the left-right ideological spectrum, those of the public most often have relied on survey data of stated, rather than revealed, preferences. However, measures of individuals’ preferences and, accordingly, estimates of their ideal points, may differ in important ways based on how preferences are elicited. In this paper, we elicit the same individuals’ preferences on the same 10 issues using two different methods: standard survey responses measured on a Likert scale and a donation exercise wherein individuals are forced to divide $1.50 between interest groups with diametrically opposed policy preferences. Importantly, expressing extreme views is costless under the former, but not the latter, method. We find that the type of elicitation method used is a significant predictor of individuals’ ideal points, and that the elicitation effect is driven primarily by Democratic respondents. Under the donation method, the ideal points of Democrats in the aggregate shift left, particularly for those Democrats who are politically engaged. In contrast, wealthy Democrats’ ideal points shift to the right. We also document effects for Republicans and Independents and find that overall polarization is similar under both elicitation methods. We conclude with a discussion of our results, and the consequences and tradeoffs of each elicitation method.  相似文献   
845.
We propose a model where a regional government’s choice of the number of bureaucratic agencies operating in a region depends upon the degree of substitutability and complementarity of the bureaucratic services being demanded. We show that, if the government perceives the citizens’ demand as a demand for substitutable services, it will choose provision by two independent agencies. If the government perceives the citizens’ demand as a demand for complementary services, it will choose provision by a single consolidated agency. Exogenous shocks to the number of citizens amplify these incentives. Evidence from the Italian National Health Service (NHS) supports this hypothesis. Results show a positive effect of proxies of substitutable services on the number of regional local health authorities and a negative effect of proxies of complementary services. The major immigration amnesties, taken as shocks to the number of citizens entitled to the service, magnify these effects.  相似文献   
846.
Georg Vanberg 《Public Choice》2018,177(3-4):199-216
Democracy and constitutionalism are both central to the Western political tradition. And yet, constitutional restrictions are often perceived to be in tension with democratic commitments. I argue that the constitutional political economy approach developed by Nobel Laureate James Buchanan resolves the tension between constitutionalism and the values of democratic governance by shifting the analysis from a system-attributes perspective that focuses on the particular institutional properties of a political order to a system-legitimacy perspective that focuses on the manner in which political institutions gain democratic legitimacy. In so doing, the approach reveals that constitutionalism can be understood as a natural expression of democratic values.  相似文献   
847.
Theories of candidate positioning suggest that candidates will respond dynamically to their electoral environment. Because of the difficulty of obtaining “bridge votes”, most existing approaches for estimating the ideal points of members of Congress generate static ideal points or ideal points that move linearly over time. We propose an approach for dynamic ideal point estimation using Project Vote Smart’s National Political Awareness Test to construct bridge votes. We use our dynamic estimates to measure aggregate change, to measure individual-level change, and to study the institutional and structural factors that explain the changing positions of House candidates and members of Congress. We demonstrate that while the Republican Party has been selecting increasingly extreme candidates, Democratic incumbents have become more extreme while in office. We also find that the congruence between elected members of Congress and their constituents is mostly explained by the selection as opposed to the responsiveness of the candidate. Nonetheless, we find evidence of dynamic responsiveness of incumbents in specific circumstances. We find that competitiveness, midterm elections, and sharing the president’s party affiliation are associated with greater responsiveness. Conversely, retirement is not associated with a change in responsiveness. We find no evidence of responsiveness of challengers. Finally, we find that close elections draw challengers who are more in line with the district’s ideology.  相似文献   
848.
Policymakers are stuck in time. Political short-termism, policy myopia, policy short-sightedness, and similar words have been coined to emphasize the present-centric policy thinking. Politics tends to produce short time horizons, and as a result, policymakers often fail to use present opportunities to mitigate future harms. Focusing on fiscal and monetary strategic interactions, given different separate decision makers, our paper aims to explore the effects of policymakers’ time horizons on debt stabilization. To formalize our ideas, we use the novel concept of Nonlinear-model-predictive-control Feedback Nash Equilibrium (NFNE) and find that present-centric policy thinking and decision horizons matters under several dimensions.  相似文献   
849.
Francesco Forte 《Public Choice》2018,174(3-4):301-313
We show that a transfer received by a minority of the population may be sustained by majority voting, however small the minority targeted may be, when the attribution of the transfer is seen as stochastic by voters. We build a simple model wherein voters differ in income and vote over a proportional tax whose proceeds are distributed lump-sum, and each voter has a probability of receiving the transfer that depends on his income. In progressive steps, we present intuitively appealing sufficient conditions on this probability function for the social program to be supported by majority voting. We also develop intuitive conditions for the emergence of the “paradox of redistribution”, whereby more focused targeting reduces the size of the transfer program chosen by the majority. We finally apply our framework to the French social housing program and obtain that our model is consistent with a majority of French voters supporting a positive size for that program.  相似文献   
850.
This paper studies changes in voting preferences over election campaigns. Building on the literature on spatial models and valence issues, we study whether (1) ideological distance to political parties, (2) assessments of party competence to handle different policy issues, and (3) voter-updated candidate evaluations are factors that explain shifts in voter choices in the weeks preceding the election. To test our hypotheses, we use data from three survey panels conducted for the 2008, 2011 and 2015 Spanish general elections. Our findings show that valence factors are more influential than ideological indifference to account for campaign conversion.  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