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   541篇
  免费   21篇
各国政治   32篇
工人农民   41篇
世界政治   67篇
外交国际关系   39篇
法律   246篇
中国政治   4篇
政治理论   127篇
综合类   6篇
  2023年   11篇
  2022年   2篇
  2021年   8篇
  2020年   16篇
  2019年   21篇
  2018年   19篇
  2017年   33篇
  2016年   34篇
  2015年   16篇
  2014年   21篇
  2013年   89篇
  2012年   24篇
  2011年   23篇
  2010年   27篇
  2009年   19篇
  2008年   21篇
  2007年   24篇
  2006年   19篇
  2005年   18篇
  2004年   24篇
  2003年   13篇
  2002年   9篇
  2001年   7篇
  2000年   6篇
  1999年   3篇
  1998年   6篇
  1995年   2篇
  1994年   2篇
  1993年   1篇
  1992年   2篇
  1991年   6篇
  1990年   6篇
  1989年   2篇
  1988年   3篇
  1986年   1篇
  1985年   1篇
  1984年   1篇
  1983年   1篇
  1982年   1篇
  1981年   1篇
  1980年   1篇
  1979年   1篇
  1978年   2篇
  1977年   1篇
  1975年   1篇
  1974年   1篇
  1973年   3篇
  1970年   1篇
  1969年   4篇
  1968年   1篇
排序方式: 共有562条查询结果,搜索用时 31 毫秒
111.
Since 1982, the collaborative editorial project of the Freedmen and Southern Society Project has published four volume of documentary material placing African Americans as slaves, soldiers, and newly free people, at the center of the process of slave emancipation in the US South. This review of the Project's fifth volume of records, Land and Labor, 1865, critically examines its contribution to our understanding of the emergence of free labor relations in the economy of the postbellum rural South. There, three forces collided in the efforts to remake labor relations after the Civil War ended slavery in the US: the efforts of slaveholders to control property and labor; the aspirations to ‘access to land and control of their own labor’ of former slaves; and the desire of Northerners to impose their own notions of ‘free labor’ as a set of contractual relations on both. Land and Labor, 1865, demonstrates how former slaves and their actions can be placed at the center of the evolution of Reconstruction policy.  相似文献   
112.
113.
Classical test theory approaches to measurement are based upon a number of fairly restrictive assumptions. The nature of these assumptions is such that scales designed to operationalize latent constructs are treated with little regard for the interaction between the human subject and the items that compose the measurement scale. A competing measurement approach, the Rasch model, has been advanced to improve upon the limitations of classical test theory. In this article, the Rasch model was applied to a scale designed to measure Tittle's control balance ratio. Analysis suggests that the original scale and response category options do not meet fundamental measurement. In particular, several items exhibited misfit (and were thus removed from the scale), response category options were reduced from eleven to four, and the scales that form the control balance ratio exhibited very little gender bias. An alternative control balance scale that retains the original items is presented, but this scale no longer summarizes the control balance ratio as one overall score. The implications of these results are addressed.  相似文献   
114.
115.
So far we have little by way of a theoretical understanding of the dynamics of electoral competition. This paper attempts to fill some of this gap by studying resource expenditure over the electoral cycle. Among the main results is that, when contributions from donors are independent of support, parties accelerate expenditure during the entire period between elections, even when voters do not forget. If contributions depend on support, and are significant, parties front load expenditure and decelerate.  相似文献   
116.
Abstract. The purpose of this paper is to study questions about taxation and revenue sharing n federal systems. It is particularly concerned with the effect of the heterogeneity of regions on the pattern of taxation and distribution and on the capacity of the central government to retain revenue for its own purposes. It is argued that one useful way to study such questions is to treat federations as coalitions that try to maximise their returns from taxations schemes. This approach is developed using the theory of the core from cooperative game theory. Emphasis is placed on the political constraints on the capacity of the central government.  相似文献   
117.
118.
In 2018, the U.S. adopted a nationwide law requiring that chain restaurants post calorie counts on their menus and menu boards. This has led to considerable interest in the extent to which providing calorie information leads consumers to choose healthier diets. To estimate the impact of calorie labeling, we conducted a randomized controlled field experiment in two full-service restaurants, in which the control group received menus without calorie counts and the treatment group received the same menus but with calorie counts. We estimate that the calorie labels resulted in a 3.0 percent reduction in calories ordered, with the reduction occurring in appetizers and entrées but not drinks or desserts. Exposure to the information also increased consumers’ support for requiring calorie labels by 9.6 percent. These results are informative about the impact of the new nationwide menu label requirement, and more generally contribute to the literature on the impact of information disclosure on consumer behavior.  相似文献   
119.
120.
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