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   340篇
  免费   31篇
各国政治   39篇
工人农民   12篇
世界政治   31篇
外交国际关系   28篇
法律   144篇
中国政治   3篇
政治理论   113篇
综合类   1篇
  2024年   1篇
  2023年   3篇
  2022年   1篇
  2021年   6篇
  2020年   7篇
  2019年   9篇
  2018年   12篇
  2017年   27篇
  2016年   27篇
  2015年   15篇
  2014年   15篇
  2013年   52篇
  2012年   21篇
  2011年   13篇
  2010年   8篇
  2009年   13篇
  2008年   14篇
  2007年   22篇
  2006年   13篇
  2005年   11篇
  2004年   14篇
  2003年   4篇
  2002年   8篇
  2001年   4篇
  2000年   3篇
  1999年   3篇
  1998年   6篇
  1997年   4篇
  1996年   2篇
  1995年   4篇
  1994年   4篇
  1993年   1篇
  1992年   2篇
  1991年   2篇
  1990年   1篇
  1989年   4篇
  1988年   3篇
  1987年   1篇
  1985年   2篇
  1984年   2篇
  1980年   3篇
  1979年   1篇
  1977年   1篇
  1974年   1篇
  1973年   1篇
排序方式: 共有371条查询结果,搜索用时 15 毫秒
201.
Due to a lack of valid and reliable scales, few studies have sought to describe and measure the business incubation process. After rigorously developing and pre-testing scales intended to measure the incubation process (Study A), we collected data from 53 incubators operating in the US in order to (a) systematically examine the incubation process, and (b) validate the scales. Accordingly, this study offers (1) new, validated scales for measuring the process of incubating new ventures, (2) empirically-based refinements to a theoretical model of the incubation process, and (3) data on business incubation outcomes that are very useful for incubator planning and benchmarking purposes.
David M. Dilts
  相似文献   
202.
Gailmard  Sean 《Public Choice》2020,185(3-4):335-357

Game theoretic analyses of American institutions and American political development largely are disconnected enterprises, yet they share many points of contact and thus opportunities for fruitful exchange. In this essay I discuss the value and limits of formalization for the enterprise of institutional analysis that those fields have in common. I conceptualize two broad approaches that formal modelers have taken to study institutions—institutions as game forms, and institutions as equilibria—that have been relatively successful for understanding institutional choice and stability. At the same time, formal modelers have been less successful in addressing institutional change and development, topics about which APD has much to offer. Overall, I contend that crosstalk between the two fields can benefit them both.

  相似文献   
203.
Research has demonstrated that management influences the performance of public organizations, but almost no research has explored how the success or failure of a public organization influences the decisions of those who manage it. Arguing that many decisions by public managers are analogous to risky choice, the authors use a well‐validated model of relative risk aversion to understand how such choices are influenced by managers’ perceptions of organizational performance. They theorize that managers will be less likely to encourage innovation or give discretion to employees when they are just reaching their goals relative to other performance conditions. Analyses of responses to the 2011 and 2013 Federal Employee Viewpoint Surveys provide considerable support for these assertions. The findings have significant implications for our understanding of the relationship between management and performance in public organizations.  相似文献   
204.
Social comparison on social media has received increasing attention, but most research has focused on one type of social comparison and its psycho-emotional implications. Little is known about how different types of social comparison influence youth’s identity development. Drawing on the theories of identity processing styles and social comparison, we examined how two different forms of social comparison on social media related to three identity processing styles, which in turn predicted youth’s global self-esteem and identity clarity. We surveyed 219 college freshmen (Mage?=?18.29; 74% female) once in the Fall and once in the Spring. Social comparison of ability on social media was related to concurrent diffuse-avoidant identity processing style, which predicted lower identity clarity months later. In contrast, social comparison of opinion on social media did not influence college freshmen’s global self-esteem and identity clarity through identity processing styles. The findings clarified the implications of online social comparison for youth’s identity development.  相似文献   
205.
As students transition to post-secondary education, they experience considerable stress and declines in academic performance. Perceived social support is thought to improve academic achievement by reducing stress. Longitudinal designs with three or more waves are needed in this area because they permit stronger causal inferences and help disentangle the direction of relationships. This study uses a cross-lagged panel and a bivariate growth curve analysis with a three-wave longitudinal design. Participants include 10,445 students (56% female; 12.6% born outside of Canada) transitioning to post-secondary education from ages 15–19. Self-report measures of academic achievement and a generalized measure of perceived social support were used. An increase in average relative standing in academic achievement predicted an increase in average relative standing on perceived social support 2 years later, but the reverse was not true. High levels of perceived social support at age 15 did not protect against declines in academic achievement over time. In sum, perceived social support appears to have no bearing on adolescents’ future academic performance, despite commonly held assumptions of its importance.  相似文献   
206.
This invited commentary seeks to encourage a critical dialogue about youth homelessness that might assist in re-energizing a field that seems increasingly stagnant with a research body focused primarily on analyses of risk, hopelessly inadequate policy frameworks in most cities, diminishing funds for services, and decreasing media attention. Reviewing major trends in research and public responses to youth homelessness in the past century, I propose that there exist three major culturally-bound dimensions from which we construct our understanding of and responses to youth homelessness. These dimensions, which are considered in a transactional framework, are the scope of responsibility, the location of moral responsibility, and the amount of agency attributed to the youth. In this review I highlight the manner in which our historically binary and uncritical understanding of these dimensional characterizations of youth homelessness has led to major lapses in the effectiveness of our collective efforts to address this problem. I highlight gaps in the existing body of research literature and provide this framework, arguing that a strategic and cohesive response is vital if we are to move from reiterations of risk and hackneyed calls for prevention strategies to the generation of meaningful solutions.  相似文献   
207.
Nicholson-Crotty  Sean 《Publius》2008,38(2):295-314
Scholars have challenged the notion of "political safeguardsof federalism" in a large and well-developed body of work onthe use of coercive policy tools by the federal government.This study suggests, however, that there may be some utilityin re-examining the political factors that help to constrainthe growth of national power. Specifically, it argues that theneed to win votes from subnational constituencies makes nationallawmakers less supportive of mandates, preemptions, and taxsanctions during election cycles and, thus, provides an intermittentsafeguard of state authority. It tests and finds evidence forhypotheses related to that general argument in analyses of thepassage of coercive federalist policies over the last thirtyyears.  相似文献   
208.
正I have a confession,and it’s one that I’m sure my Chinese colleagues will berate me for:When it came to Traditional Chinese Medicine(TCM),I was a bit of a doubter.I didn’t doubt that Chinese medicine could be effective.I just wasn’t sure that in this age of modern medicine,where pharmacies have come to resemble Hogwarts Potions Labs,  相似文献   
209.
210.
This is an excerpt from “Space Security 2003,” published March 2004 by the International Security Research and Outreach Programme of the Canadian Department of Foreign Affairs and International Trade. The views and positions stated in this paper are soley those of the contributors to this research project and are not intended to reflect the views and positions of the Department of Foreign Affairs or the Government of Canada. A review of the project was provided to the “Ensuring Space Security: Enhancing Stakeholder Cooperation” Conference by Dr. Robert Lawson, Senior Policy Advisor Non-Proliferation, Arms Control and Disarmament Division, Canadian Department of Foreign Affairs and International Trade.  相似文献   
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