全文获取类型
收费全文 | 22964篇 |
免费 | 1422篇 |
专业分类
各国政治 | 984篇 |
工人农民 | 1018篇 |
世界政治 | 1549篇 |
外交国际关系 | 748篇 |
法律 | 15688篇 |
中国共产党 | 2篇 |
中国政治 | 137篇 |
政治理论 | 4134篇 |
综合类 | 126篇 |
出版年
2021年 | 117篇 |
2020年 | 502篇 |
2019年 | 534篇 |
2018年 | 679篇 |
2017年 | 705篇 |
2016年 | 782篇 |
2015年 | 628篇 |
2014年 | 640篇 |
2013年 | 2398篇 |
2012年 | 603篇 |
2011年 | 645篇 |
2010年 | 662篇 |
2009年 | 695篇 |
2008年 | 646篇 |
2007年 | 630篇 |
2006年 | 651篇 |
2005年 | 572篇 |
2004年 | 570篇 |
2003年 | 480篇 |
2002年 | 516篇 |
2001年 | 883篇 |
2000年 | 773篇 |
1999年 | 641篇 |
1998年 | 326篇 |
1997年 | 229篇 |
1996年 | 250篇 |
1995年 | 259篇 |
1994年 | 245篇 |
1993年 | 250篇 |
1992年 | 436篇 |
1991年 | 430篇 |
1990年 | 413篇 |
1989年 | 410篇 |
1988年 | 407篇 |
1987年 | 379篇 |
1986年 | 423篇 |
1985年 | 428篇 |
1984年 | 336篇 |
1983年 | 319篇 |
1982年 | 249篇 |
1981年 | 221篇 |
1980年 | 189篇 |
1979年 | 307篇 |
1978年 | 172篇 |
1977年 | 144篇 |
1976年 | 121篇 |
1975年 | 139篇 |
1974年 | 169篇 |
1973年 | 129篇 |
1972年 | 115篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
831.
GUNNAR THESEN PETER B. MORTENSEN CHRISTOFFER GREEN-PEDERSEN 《European Journal of Political Research》2020,59(3):555-577
An extensive body of research documents how governing parties generally suffer electoral defeats. Varying explanations have been offered, most of which touch upon the liabilities of policy responsibility. Although media coverage is generally acknowledged as one of these liabilities, few empirical studies have examined how news content affect government support. Based on the fact that voters get their information about politics, policies and societal issues from the media, this article studies how the constant stream of negative news influences incumbent support over a 20-year period in Denmark. Modeling a previously untested argument on the cost of ruling, it shows that the accumulation of bad news throughout tenure exerts a substantial effect on government support. 相似文献
832.
There is an ongoing debate among practitioners and scholars about the security consequences of transnational migration. Yet, existing work has not, so far, fully taken into account the policy instruments states have at their disposal to mitigate these risks, and reliable evidence is lacking for the effectiveness of such measures. This article addresses both shortcomings as whether and to what extent national migration policies affect the diffusion of terrorism via population movements are analysed. Spatial analyses report robust support for a moderating influence of states’ policies: while terrorism can travel from one country to another via larger migration populations, this only applies to target countries with extremely lax regulations and control mechanisms. This research sheds new light on the security implications of population movements, and it crucially adds to our understanding of governments’ instruments for addressing migration challenges as well as their effectiveness. 相似文献
833.
Steven W. Hemelt Nathaniel L. Schwartz Susan M. Dynarski 《Journal of policy analysis and management》2020,39(3):686-719
Dual-credit courses expose high school students to college-level content and provide the opportunity to earn college credits, in part to smooth the transition to college. With the Tennessee Department of Education, we conduct the first randomized controlled trial of the effects of dual-credit math coursework on a range of high school and college outcomes. We find that the dual-credit advanced algebra course alters students’ subsequent high school math course-taking, reducing enrollment in remedial math and boosting enrollment in precalculus and Advanced Placement math courses. We fail to detect an effect of the dual-credit math course on overall rates of college enrollment. However, the course induces some students to choose four-year universities instead of two-year colleges, particularly for those in the middle of the math achievement distribution and those first exposed to the opportunity to take the course in eleventh rather than twelfth grade. We see limited evidence of improvements in early math performance during college. 相似文献
834.
Drew M. Anderson Katharine M. Broton Sara Goldrick-Rab Robert Kelchen 《Journal of policy analysis and management》2020,39(3):720-739
We conduct the first long-term experimental evaluation of a need-based financial aid program, the privately funded Wisconsin Scholars Grant. Over multiple cohorts, the program failed to increase degree completion and graduate school enrollment up to 10 years after matriculation. The program did reduce time-to-degree for some students and modestly increased the number of STEM degrees earned. The lack of robust effects raises important questions about the conditions necessary for financial aid to benefit students. 相似文献
835.
Political Behavior - Americans are increasingly turning to social media for political information. However, given that the average social media user only clicks through on a small fraction of the... 相似文献
836.
Greenlee Jill S. Nteta Tatishe M. Rhodes Jesse H. Sharrow Elizabeth A. 《Political Behavior》2020,42(3):655-695
Political Behavior - Throughout her 2016 U.S. presidential campaign, Democratic Party nominee Hillary Clinton crafted messages intended to appeal to fathers of daughters and to highlight the... 相似文献
837.
AbstractThis article analyses party strategies during the campaign for the Dutch general election of March 2017, making use of issue-yield theory. It investigates whether parties strategically emphasise high-yield issues, by juxtaposing the issue opportunities provided by voters with parties’ issue emphasis during the campaign. More specifically, it asks whether parties strategically emphasised issues that were expected to reward them electorally. Analysing voter preferences and party campaign data, it is found that parties and most of their constituencies show high ideological consistency, that parties emphasise mostly positional issues and thus choose a conflict-mobilising strategy, and that most parties emphasise high-yield issues rather than following the general political agenda. Four small parties that won significantly behaved strategically while the social democrats – who severely lost – hardly did. The findings imply that the issue-yield framework can help to explain the election result in the fragmented Dutch multi-party context. 相似文献
838.
Policy Sciences - Throughout the developing world, payments for ecosystem services (PES) programs are popular policy instruments that allow those who rely on such amenities as drinking water and... 相似文献
839.
840.
Both China and India are adopting information and communication technologies to facilitate openness and transparency in their governments, and hence reduce corruption. Distinctive from their traditional anticorruption approaches, is the innovative e-government approach an effective solution to corruption in these two large developing countries? This paper addresses the question through comparative in-depth interviews with 44 mid- or senior-level officials in the public sector in these two countries. The first study of its kind, our research shows that civil servants in both countries overall think positively about transparency and technology in reducing corruption. However, to what extent these innovative measures will be effective is conditional on various factors, such as political willingness, income inequality, and infrastructure readiness. What is worth noting is that the Chinese respondents were more positive regarding the role of transparency, whereas the Indian respondents were more positive about the role of technology, which may reflect the different facilitators of corruption and the constraints of anticorruption in China and India. 相似文献