全文获取类型
收费全文 | 24472篇 |
免费 | 753篇 |
专业分类
各国政治 | 1237篇 |
工人农民 | 962篇 |
世界政治 | 2043篇 |
外交国际关系 | 908篇 |
法律 | 14324篇 |
中国共产党 | 3篇 |
中国政治 | 216篇 |
政治理论 | 5279篇 |
综合类 | 253篇 |
出版年
2020年 | 309篇 |
2019年 | 365篇 |
2018年 | 502篇 |
2017年 | 571篇 |
2016年 | 608篇 |
2015年 | 450篇 |
2014年 | 504篇 |
2013年 | 2613篇 |
2012年 | 589篇 |
2011年 | 695篇 |
2010年 | 536篇 |
2009年 | 583篇 |
2008年 | 636篇 |
2007年 | 643篇 |
2006年 | 618篇 |
2005年 | 556篇 |
2004年 | 584篇 |
2003年 | 619篇 |
2002年 | 516篇 |
2001年 | 944篇 |
2000年 | 875篇 |
1999年 | 735篇 |
1998年 | 408篇 |
1997年 | 332篇 |
1996年 | 298篇 |
1995年 | 293篇 |
1994年 | 336篇 |
1993年 | 304篇 |
1992年 | 451篇 |
1991年 | 486篇 |
1990年 | 444篇 |
1989年 | 439篇 |
1988年 | 432篇 |
1987年 | 455篇 |
1986年 | 463篇 |
1985年 | 449篇 |
1984年 | 408篇 |
1983年 | 439篇 |
1982年 | 330篇 |
1981年 | 297篇 |
1980年 | 247篇 |
1979年 | 325篇 |
1978年 | 228篇 |
1977年 | 197篇 |
1976年 | 184篇 |
1975年 | 168篇 |
1974年 | 178篇 |
1973年 | 159篇 |
1972年 | 154篇 |
1971年 | 138篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
851.
Edward J. Bird 《Journal of policy analysis and management》1996,15(1):1-31
Using data from the Michigan Panel Study of Income Dynamics, this article estimates the impact of the Earned Income Tax Credit (EITC) on economic risk. Risk is measured through the variance of full income (income holding labor supply constant). The results show that the EITC significantly reduces economic risk, but its effects are weaker dollar for dollar than traditional means-tested programs like Food Stamps. The difference is not statistically significant, however. Moreover, for many middle-class people, the risk-reduction benefits of the EITC exceed the tax burden it imposes. This is less true of means-tested transfers. These results are significant for the politics of antipoverty policy. They show that a real-world antipoverty program can generate enough middle-class economic security to build for itself a solid base of political support. 相似文献
852.
Laura M. Argys Daniel I. Rees Dominic J. Brewer 《Journal of policy analysis and management》1996,15(4):623-645
Schools across the country are ending the practice of grouping students based on ability, in part, because of research indicating that tracking hurts low-ability students without helping students of other ability levels. Using a nationally representative survey conducted by the National Center for Education Statistics, (NCES) we reexamine the impact of tracking on high school student achievement through the estimation of a standard education production function. This approach allows us to control for the possibility that track is correlated with factors such as class size and teacher education. In addition, we address the possibility that there are unobserved student or school characteristics that affect both achievement and track placement. Our results indicate that abolishing tracking in America's schools would have a large positive impact on achievement for students currently in the lower tracks, but that this increase in achievement would come at the expense of students in upper-track classes. 相似文献
853.
Jarman Hannah K. Marques Mathew D. McLean Siân A. Slater Amy Paxton Susan J. 《Journal of youth and adolescence》2021,50(12):2279-2293
Journal of Youth and Adolescence - Adolescents are spending considerable time on social media, yet it is unclear whether motivations for social media use drive different forms of social media... 相似文献
854.
高等教育创新的新机遇 总被引:1,自引:0,他引:1
刘遵义 《国家教育行政学院学报》2006,(9):20-23
人口结构的变化、科学技术的变革以及经济全球化,都对高等教育产生了很大影响,提供了很多新的机遇。这些机遇不仅可以提高我们的效率,同时也可以带来新的创造知识和传播知识的方式方法。 相似文献
855.
In this study we examined the role of psychological buffers (life satisfaction, self-esteem, perception of family cohesion, and perception of social support) in the development of hopelessness and suicidal ideation. The participants were 314 university students, 71 males and 243 females, who were asked to complete a battery of instruments measuring the psychological buffers mentioned above. The results of a set of hierarchical multiple regression analyses suggested that life satisfaction and self-esteem are independent predictors of lower levels of hopelessness, while perception of social support seems to be the major predictor of lower levels of suicidal ideation independent of depression and hopelessness severity. Thus, hopelessness seems to be minimized by the level of life satisfaction and level of self-esteem exhibited by the individuals, while the key factor to the mitigation of suicidal ideas seems to be perception of social support. 相似文献
856.
This essay questions the soundness of a scholarly shift awayfrom refugee studies in favour of forcedmigration studies. It contends, first, that subsumingrefugee studies into the broader framework of forced migrationstudies may result in a failure to take account of the specificityof the refugee's circumstances which are defined not just bymovement to avoid the risk of harm, but by underlying socialdisfranchisement coupled with the unqualified ability of theinternational community to respond to their needs. Second, itargues that forced migration (rather than, forexample, forced migrant) studies encourages afocus on a phenomenon rather than on the personal predicaments,needs, challenges, and rights of refugees themselves. It maythus contribute to a lack of criticality in relation to policieswhich subordinate refugee autonomy to the pursuit of more systemicconcerns. The first concern is illustrated by reference to theemergence of the internally displaced personscategory, the second by reference to the determination to findand mandate durable solutions to forced migration,including to the movement of refugees. 相似文献
857.
During 2005, the European Union and China marked 30 years of diplomatic relations with much fanfare. Celebrations surrounding
the anniversary however belied the fact that throughout most of this period the European Union and China remained largely
aloof from one another. The strengthening of EU foreign policy over time, as well as the economic reforms and new outward
orientation exhibited by China have changed the dynamics of the relationship. Both sides are increasingly recognizing the
potential mutual benefits that can be accrued from a closer relationship. This paper assesses EU-China relations from both
economic and political perspectives. In terms of economics, it is clear that the EU must build stronger relations with China
if it is to accrue the benefits of access to an expanding market with over one billion people. To do so successfully however,
the EU will have to reconcile the economic and political components of its foreign policy. The EU continues to challenge the
Chinese government to reform its practices on a number of issues including human rights, democratic reform, and Tibet, all
of which remain bones of contention. How the EU achieves the balance between political constraints and economic opportunities
is the primary focus of this paper.
相似文献
Carol M. Glen (Corresponding author)Email: |
Richard C. MurgoEmail: |
858.
Abstract We study the degree of convergence or divergence in fiscal decentralization in the European Union over the period 1995–2015 using a club convergence approach. First, we analyze non-central expenditure and revenue as percentages of GDP, of total expenditure and of total revenue. The results for the EU-15 countries indicate some clustering, with three clubs formed when using GDP and four to five when using total revenue or expenditure. Second, we study the gap between expenditure and revenue as a proxy of fiscal responsibility. This results in three and two clubs respectively, with Denmark as the divergent country with the highest gap. Finally, we analyze potential unions of clubs and transitions. We also interpret our results taking into account variables found in the literature as determinants of fiscal decentralization. These results show how European countries are quite heterogeneous in terms of fiscal federalism and decentralization, with greater convergence in fiscal responsibility than in the other magnitudes. 相似文献
859.
Research on the public affairs profession in both South and Latin America is one of the leading limitations today in international public relations research. This study helps to lessen such a gap by offering more realistic insight into the ideologies and pressures that govern public affairs practice in Chile. In‐depth interviews were conducted with 15 experts who are current senior‐level public affairs practitioners in the Chilean capital of Santiago. Results offer three key insights: First, the core function of public affairs in Chile surrounds behaviors of lobbying and governmental relations. Second, leveraging cohesion between organizational private interest and the public interest is a key to leveraging pressure on elected officials and governmental agencies. Lastly, there is significant concern regarding public trust in the lack of transparency in the Chilean public affairs field, facilitated by insufficient governmental regulation. Such research offers practical and grounded insights for public affairs and public relations scholarship. 相似文献
860.
J. Michael Angstadt 《政策研究评论》2020,37(2):244-259
As the emergence of nongovernmental conservation efforts generates conflict among various stakeholders, the causal story that each party articulates regarding conservation and the causes of land degradation reflects their unique interests. This study uses existing literature to evaluate causal stories surrounding a contemporary conservation effort: Montana's American Prairie Reserve. Through qualitative review of web‐based documents and newspaper articles, it generates a preliminary account of key stakeholders' causal stories. The case study suggests that parties who might be disadvantaged by ascribing responsibility for environmental harms in an adversarial fashion may instead elect to articulate causal stories that are more neutral than existing approaches might forecast. The study concludes by suggesting that further development of causal story literature may enable it to better address contemporary conservation efforts. 相似文献