全文获取类型
收费全文 | 1869篇 |
免费 | 61篇 |
专业分类
各国政治 | 152篇 |
工人农民 | 61篇 |
世界政治 | 98篇 |
外交国际关系 | 65篇 |
法律 | 1268篇 |
中国政治 | 9篇 |
政治理论 | 266篇 |
综合类 | 11篇 |
出版年
2022年 | 11篇 |
2020年 | 36篇 |
2019年 | 38篇 |
2018年 | 51篇 |
2017年 | 68篇 |
2016年 | 63篇 |
2015年 | 29篇 |
2014年 | 40篇 |
2013年 | 221篇 |
2012年 | 47篇 |
2011年 | 64篇 |
2010年 | 44篇 |
2009年 | 42篇 |
2008年 | 51篇 |
2007年 | 52篇 |
2006年 | 47篇 |
2005年 | 54篇 |
2004年 | 52篇 |
2003年 | 58篇 |
2002年 | 44篇 |
2001年 | 63篇 |
2000年 | 51篇 |
1999年 | 49篇 |
1998年 | 18篇 |
1997年 | 14篇 |
1996年 | 20篇 |
1995年 | 13篇 |
1994年 | 14篇 |
1993年 | 14篇 |
1992年 | 30篇 |
1991年 | 32篇 |
1990年 | 36篇 |
1989年 | 39篇 |
1988年 | 37篇 |
1987年 | 26篇 |
1986年 | 37篇 |
1985年 | 26篇 |
1984年 | 22篇 |
1983年 | 17篇 |
1982年 | 12篇 |
1981年 | 18篇 |
1980年 | 11篇 |
1979年 | 19篇 |
1978年 | 21篇 |
1977年 | 16篇 |
1971年 | 18篇 |
1970年 | 17篇 |
1969年 | 11篇 |
1968年 | 17篇 |
1967年 | 12篇 |
排序方式: 共有1930条查询结果,搜索用时 15 毫秒
31.
32.
This article examines whether the small number of Social Security beneficiaries living abroad enjoy a higher standard of living than they would with the same benefits if they lived in the United States. The article addresses this question using two methods. First, absolute comparisons of U.S. dollar purchasing power abroad are made using "purchasing power parities," a method recently developed to allow international comparisons of real standards of living. Second, the effects of changes in Social Security benefit levels, exchange rates, and rates of inflation on the relative value of benefits abroad are measured. Both methods show considerable instability in purchasing power of Social Security benefits in the 1970's. Although beneficiaries in 1970 generally could live better abroad than in the United States, this advantage eroded considerably during the 1970's, followed by some improvement in 1981-82. 相似文献
33.
Skull identification by electronic photo-composition can, with the help of a video-animation compositor, be further developed beyond the pure superprojection technique into an animated picture difference image. The employment of this combined technique to be recommended on account of the improved possibilities of control to be realized in the congruity of the superprojection composite picture. 相似文献
34.
The photographic identification of a skull through the well-known superprojection technique can be modified and decisively improved by the use of a video-tape system. The identification method based on electronic photo composition is methodically simple to use. It offers the examiner the possibility to recognize the relationship between bone and soft part proportions, and the structure of the bone surface and the details of the soft part shape, as a concrete, tangible characteristic of identity to a substantially greater extent. The large number of controllable characteristics inherent in the ihgh degree of individuality of the skull offers not just an either/or "The skull fits"/ "It does not fit" into a photograph, but achieves proof of disproof of identity. 相似文献
35.
In the current debate on the future European order, the European Union (EU) is often described as an "emerging federation." This article claims that federalism is not exclusively useful in deliberating about the future of the EU. Non-statecentric conceptions of federalism provide a better understanding of the current structure and functioning of the European system of multilevel governance than most theories of European integration and international relations do. We combine political and economic perspectives of federalism to analyze the "balancing act" between effective political representation and efficient policy-making in the EU. Drawing on the examples of Germany and Switzerland in particular, we argue that the increasing delegation of powers to the central EU level needs to be paralleled by strengthened patterns of fiscal federalism and an empowered representation of functional interests at the European level. Without such "rebalancing," the current legitimacy problems of the EU are likely to intensify. 相似文献
36.
Tammy O Tengs Sajjad Ahmad Rebecca Moore Eric Gage 《Journal of policy analysis and management》2004,23(4):857-872
If manufacturing a safer cigarette is technically possible--an open question--then mandating that tobacco manufacturers improve the safety of cigarettes would likely have both positive and negative implications for the nation's health. On the one hand, removing toxins may reduce the incidence of smoking-related diseases and premature mortality in smokers. On the other hand, smokers might be less inclined to quit, those who have quit might resume the habit, and youth who have never smoked will have one less reason to avoid tobacco use. To assess the expected population health impacts of a legislative or regulatory mandate, we created the Tobacco Policy Model, a system dynamics computer simulation model. The model relies on secondary data and simulates the U.S. population over time spans as long as 50 years. Our simulation results reveal that even if requiring cigarettes to be safer makes smoking more attractive and increases tobacco use, a net gain in population health is still possible. 相似文献
37.
Linda Lopez 《政策研究评论》2005,22(1):77-92
This research examines the impact of grassroots organizing at the community level in Chiapas, Mexico, to address problems associated with human rights advocacy and implementation. Traditionally, the nation‐state has had the primary responsibility to address issues pertaining to human rights violations and the enforcement of international human rights principles and treaties. Local political struggles and acts of resistance by disenfranchised groups in Mexico offer insight to understand the impact of indigenous and other social movements in furthering human rights. Indigenous populations in the state of Chiapas use local community dispute resolution to contest the inadequacy of the state in responding to the problems that give rise to poverty, lack of human dignity, educational access, racial and ethnic discrimination, lack of political participation in government and the right to equality in economic, social, and political sectors. Drawing from research based on participant observations in Chiapas, Mexico, there is some evidence to suggest that since the 1994 EZLN (Zapatista National Liberation Army) uprising several micro‐level political and social movements have contested the power of the state through symbolic and pragmatic organizing efforts. These groups include, but are not limited to, nongovernmental organizations (NGOs), women's groups, and indigenous groups. After the Zapatista uprising, these groups were instrumental in making claims against the state through numerous activities: protests to end the war, the development of NGOs to observe human rights violations, civilian‐based Zapatista support groups (base de apoyo), peace camps, and open dialogue with the EZLN. I argue that collective mobilization in local communities serves both symbolic and pragmatic efforts in helping disenfranchised groups empower themselves to address economic, social, and political inequality. Local‐level activism has fueled a sense of self‐empowerment to change state institutional responses and to involve sectors of civil society domestically and internationally to initiate a proper resolution of issues that are fundamentally related to human rights. 相似文献
38.
Mark O’Brien 《社会福利与家庭法律杂志》2016,38(4):413-429
This paper reflects upon the gross discrepancies between the reassurances given in 2010 by the 2010-2015 UK Coalition Government that their budget and welfare cuts would fall ‘fairly’ across the income spectrum, and the reality of what had happened by the end of that government. It asks how the ‘distributional impact assessment’ provided with the 2010 Comprehensive Spending Review could have been so wrong. In seeking to answer this question, types of systematic bias are considered along with a discussion of ‘marginality’ in assessments of impact. Drawing upon the role of ‘power’ in impact assessment, it traces the ways in which methodological assumptions can eclipse the real life effects of policies behind ‘the average’ as well as by the unfair selection of the ‘unit-of-analysis’. 相似文献
39.
We compare several risk preference elicitation methods – including incentivised, non-incentivised, and framed methods as well as a traditional Likert survey question – in a developing country and empirically test how well consequent measures of risk attitudes predict risk taking behaviour. We find that Likert scale and non-incentivised framed survey questions are not sufficient substitutes for costlier incentivised methods in rural Niger. Instead, the incentivised framed question works best while a simplified incentivised lottery question works almost as well. More risk and ambiguity averse farmers are less likely to adopt fertiliser microdosing indicating the importance of insurance and strategies to promote learning. 相似文献
40.