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   5460篇
  免费   193篇
各国政治   286篇
工人农民   237篇
世界政治   347篇
外交国际关系   228篇
法律   3512篇
中国共产党   1篇
中国政治   48篇
政治理论   974篇
综合类   20篇
  2023年   32篇
  2022年   34篇
  2021年   53篇
  2020年   96篇
  2019年   102篇
  2018年   162篇
  2017年   178篇
  2016年   171篇
  2015年   144篇
  2014年   146篇
  2013年   545篇
  2012年   211篇
  2011年   209篇
  2010年   136篇
  2009年   154篇
  2008年   174篇
  2007年   170篇
  2006年   152篇
  2005年   132篇
  2004年   136篇
  2003年   128篇
  2002年   131篇
  2001年   210篇
  2000年   166篇
  1999年   129篇
  1998年   52篇
  1997年   55篇
  1996年   47篇
  1995年   57篇
  1994年   50篇
  1993年   59篇
  1992年   87篇
  1991年   93篇
  1990年   85篇
  1989年   68篇
  1988年   84篇
  1987年   84篇
  1986年   100篇
  1985年   110篇
  1984年   93篇
  1983年   88篇
  1982年   44篇
  1981年   38篇
  1979年   40篇
  1978年   37篇
  1975年   31篇
  1974年   45篇
  1971年   31篇
  1970年   31篇
  1968年   32篇
排序方式: 共有5653条查询结果,搜索用时 15 毫秒
861.
862.
ABSTRACT

Institutions undertake a huge variety of constitutive purposes. One of the roles of legitimacy is to protect and promote an institution’s pursuit of its purpose; state legitimacy is generally understood as the right to rule, for example. When considering legitimacy beyond the state, we have to take account of how differences in purposes change legitimacy. I focus in particular on how differences in purpose matter for the stringency of the standards that an institution must meet in order to be legitimate. An important characteristic of an institution’s purpose is its deontic status, i.e. whether it is morally impermissible, merely permissible, or mandatory. Although this matters, it does so in some non-obvious ways; the mere fact of a morally impermissible purpose is not necessarily delegitimating, for example. I also consider the problem of conflicting, multiple, and contested institutional purposes, and the different theoretical roles for institutional purpose. Understanding how differences in purpose matter for an institution’s legitimacy is one part of the broader project of theorizing institutional legitimacy in the many contexts beyond the traditional context of the state.  相似文献   
863.
Abstract

The analysis of issue politics has long suffered from a fragmentation between valence and positional conceptualisations, preventing the effective development of a general model of issue-based party competition. Building on an overview of the evolution of party competition in the Western world in recent decades, this article offers a theoretical development that builds on ‘issue yield’ theory to provide a conceptualisation of political goals that generalises across positional and valence issues. This in turn allows a common measurement strategy, offering the possibility to comparatively assess various characteristics (including the electoral potential) of both positional and valence issues. Finally, it describes the specific research design derived from this framework and its implementation in comparative perspective in six West European countries during 2017–2018.  相似文献   
864.
ABSTRACT

Studies have shown that long-lived individuals seem to pass their survival advantage on to their offspring. Offspring of long-lived parents had a lifelong survival advantage over individuals without long-lived parents, making them more likely to become long-lived themselves. We test whether the survival advantage enjoyed by offspring of long-lived individuals is explained by environmental factors. 101,577 individuals from 16,905 families in the 1812–1886 Zeeland cohort were followed over time. To prevent that certain families were overrepresented in our data, disjoint family trees were selected. Offspring was included if the age at death of both parents was known. Our analyses show that multiple familial resources are associated with survival within the first 5 years of life, with stronger maternal than paternal effects. However, between ages 5 and 100 both parents contribute equally to offspring’s survival chances. After age 5, offspring of long-lived fathers and long-lived mothers had a 16-19% lower chance of dying at any given point in time than individuals without long-lived parents. This survival advantage is most likely genetic in nature, as it could not be explained by other, tested familial resources and is transmitted equally by fathers and mothers.  相似文献   
865.
ABSTRACT

Following the law of 1884 that re-authorised divorce in France, divorce was more frequent in the large cities before spreading to other urban areas and then to rural ones. Divorce rates were especially high in the Seine département from 1884 to the eve of the First World War. In this region, divorced people lived more frequently in Paris than in the suburbs. More precisely, they resided more often on the Right Bank of the Seine in Paris proper (intra-muros) and, as an extension of this area, in the suburban cities to the west and, to the east, around the Bois de Vincennes. A comparison of the share of divorced men and women to the economic, demographic and cultural characteristics of the 20 Paris arrondissements and 74 suburban municipalities in the Seine département shows that a portion of the spatial distribution can be explained by the occupational structures of the area. Divorced people seldom lived in the most rural areas. This urban/rural divide can be explained by two main factors that can be complementary: the economic possibility to divorce – and here we will add the economic possibility for women to leave live alone after a divorce – and the social and cultural acceptance of divorce.  相似文献   
866.
Abstract

The United States has historically accepted and resettled refugees by opening its doors to those fleeing violence, armed conflict, or persecution around the world. However, the degree of receptivity toward refugee resettlement has vacillated over time. This study examines the challenges and opportunities that Refugee Resettlement Agencies (RRAs) experienced prior to and after the 2016?U.S. Presidential election. The findings presented in this paper, based on focus groups with the RRA staff, revealed that there is a greater need for understanding the refugee resettlement process and how changing immigration policies impact state-federal funding.  相似文献   
867.
Abstract

This article reports on timing the adverse effects of black carbon released into the atmosphere from biomass combustion, vehicular emissions and local combustion sources. Black carbon contributes to global warming through its light absorption capacity, has a direct and indirect impact on climate and public health, and will result in ongoing environmental damages and claims. The authors studied measurements of black carbon taken in Delhi, India during 2016 and 2017, and reports on seasonal factors that contribute to higher emissions.  相似文献   
868.
Medicare is a large government health insurance program in the United States that covers about 60 million people. This paper analyzes the effects of Medicare insurance on health for a group of people in urgent need of medical care: people with cancer. We used a regression discontinuity design to assess impacts of near-universal Medicare insurance at age 65 on cancer detection and outcomes, using population-based cancer registries and vital statistics data. Our analysis focused on the three tumor sites for which screening is recommended both before and after age 65: breast, colorectal, and lung cancer. At age 65, cancer detection increased by 72 per 100,000 population among women and 33 per 100,000 population among men; cancer mortality also decreased by nine per 100,000 population for women but did not significantly change for men. In a placebo check, we found no comparable changes at age 65 in Canada. This study provides the first evidence to our knowledge that near-universal access to Medicare at age 65 is associated with improvements in population-level cancer mortality.  相似文献   
869.
870.
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