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   3612篇
  免费   98篇
各国政治   254篇
工人农民   135篇
世界政治   323篇
外交国际关系   197篇
法律   1537篇
中国政治   15篇
政治理论   1206篇
综合类   43篇
  2023年   14篇
  2020年   50篇
  2019年   51篇
  2018年   71篇
  2017年   77篇
  2016年   104篇
  2015年   59篇
  2014年   80篇
  2013年   594篇
  2012年   75篇
  2011年   98篇
  2010年   93篇
  2009年   91篇
  2008年   107篇
  2007年   120篇
  2006年   101篇
  2005年   98篇
  2004年   106篇
  2003年   112篇
  2002年   156篇
  2001年   83篇
  2000年   83篇
  1999年   86篇
  1998年   67篇
  1997年   80篇
  1996年   58篇
  1995年   46篇
  1994年   39篇
  1993年   52篇
  1992年   56篇
  1991年   60篇
  1990年   43篇
  1989年   55篇
  1988年   45篇
  1987年   46篇
  1986年   56篇
  1985年   54篇
  1984年   33篇
  1983年   59篇
  1982年   45篇
  1981年   32篇
  1980年   28篇
  1979年   25篇
  1978年   26篇
  1977年   22篇
  1976年   26篇
  1975年   19篇
  1974年   28篇
  1973年   14篇
  1971年   14篇
排序方式: 共有3710条查询结果,搜索用时 15 毫秒
951.
Poor working conditions in global supply chains have led to private initiatives that seek to regulate labor practices in developing countries. But how effective are these regulatory programs? We investigate the effects of transnational private regulation by studying Hewlett‐Packard's (HP) supplier responsibility program. Using analysis of factory audits, interviews with buyer and supplier management, and field research at production facilities across seven countries, we find that national context – not repeated audits, capability building, or supply chain power – is the key predictor of workplace compliance. Quantitative analysis shows that factories in China are markedly less compliant than those in countries with stronger civil society and regulatory institutions. Comparative field research then illustrates how these local institutions complement transnational private regulation. Although these findings imply limits to private regulation in institutionally poor settings, they also highlight opportunities for productive linkages between transnational actors and local state and society.  相似文献   
952.
In the second of our series of articles considering the EU’s limited harmonisation of the laws regulating the activities of businesses using the Internet, we look at the rules governing contracting and selling online. We consider the circumstances in which three key EU directives apply, the rights, under these directives, of consumers who contract online and the effect of electronic signatures as used for online contracting.  相似文献   
953.
The statistical procedures typically used for forecasting in criminal justice settings rest on symmetric loss functions. For quantitative response variables, overestimates are treated the same as underestimates. For categorical response variables, it does not matter in which class a case is inaccurately placed. In many criminal justice settings, symmetric costs are not responsive to the needs of stakeholders. It can follow that the forecasts are not responsive either. In this paper, we consider asymmetric loss functions that can lead to forecasting procedures far more sensitive to the real consequences of forecasting errors. Theoretical points are illustrated with examples using criminal justice data of the kind that might be used for “predictive policing.”  相似文献   
954.
Randi Weingarten is the president of the most vocal and influential teachers’ union, the American Federation of Teachers. Since rising through the ranks to AFT president in just two years, Weingarten is now a major, if not the most prominent, nongovernmental player in national education policy. She has earned deep respect from many educational policy actors. Likewise, Weingarten elicits withering criticism from others. This fascinating profile explains why, in such a brief period, she has proved to be a fierce, fearless, and effective leader under extraordinarily difficult circumstances. Her experience offers invaluable lessons applicable for others working in similarly intense policy arenas.  相似文献   
955.
Limited Learning on College Campuses   总被引:1,自引:0,他引:1  
  相似文献   
956.
In this study we resolve part of the confusion over how foreign aid affects armed conflict. We argue that aid shocks—severe decreases in aid revenues—inadvertently shift the domestic balance of power and potentially induce violence. During aid shocks, potential rebels gain bargaining strength vis‐à‐vis the government. To appease the rebels, the government must promise future resource transfers, but the government has no incentive to continue its promised transfers if the aid shock proves to be temporary. With the government unable to credibly commit to future resource transfers, violence breaks out. Using AidData's comprehensive dataset of bilateral and multilateral aid from 1981 to 2005, we evaluate the effects of foreign aid on violent armed conflict. In addition to rare‐event logit analysis, we employ matching methods to account for the possibility that aid donors anticipate conflict. The results show that negative aid shocks significantly increase the probability of armed conflict onset.  相似文献   
957.
Much of the existing research on the prevalence and consequences of peer victimization focuses on “bullying” at school, often omitting from consideration non-bullying types of peer victimization as well as events that occur outside of school. The purpose of this study was to examine past-year exposure to peer-perpetrated victimization, occurring both within and outside of school contexts, among school-aged children in the United States. The study is based on a representative sample of 2,999 youth ages 6–17 (50% female; 45% non-white) from the 2008 National Survey of Children’s Exposure to Violence (NatSCEV). Findings revealed age, gender, race, and family structure variations in many forms of peer victimization and demonstrated significant independent and cumulative effects of six different types of peer victimization (physical assault, physical intimidation, emotional victimization, sexual victimization, property crime, and internet harassment) on trauma symptoms. Findings also showed that, although victimization at school is substantial, a considerable proportion of peer victimizations occur away from school contexts. The findings highlight the importance of comprehensive measurement of multiple forms of peer victimization that occur both at school and elsewhere, rather than focusing exclusively on traditional measures of school-focused bullying.  相似文献   
958.
Prevalence differences in depressive symptoms between the sexes typically emerge in adolescence, with symptoms more prevalent among girls. Some evidence suggests that variation in onset and progression of puberty might contribute to these differences. This study used a genetically informative, longitudinal (assessed at ages 12, 14, and 17) sample of Finnish adolescent twins (N = 1214, 51.6% female) to test whether etiological influences on depressive symptoms differ as a function of pubertal status. These tests were conducted separately by sex, and explored longitudinal relationships. Results indicated that pubertal development moderates environmental influences on depressive symptoms. These factors are more important on age 14 depressive symptoms among more developed girls relative to their less developed peers, but decrease in influence on age 17 depressive symptoms. The same effects are observed in boys, but are delayed, paralleling the delay in pubertal development in boys compared to girls. Thus, the importance of environmental influences on depressive symptoms during adolescence changes as a function of pubertal development, and the timing of this effect differs across the sexes.  相似文献   
959.
Data are presented from a pilot study that tested the initial effectiveness of the Dialectical Psychoeducational Workshop (DPEW) in reducing the potential risk for intimate partner violence (IPV). A randomized controlled trial (RCT) of an experimental intervention (DPEW), and a control condition, the first session of an eight-week anger management program (AMW), was employed. Differences between experimental and control groups were analyzed by chi-square and t tests. Self-report questionnaires were administered pre- and post-test to 55 study participants. The questionnaire was comprised of standardized measures and highly-structured questions. Quantitative analyses provided strong preliminary support for the DPEW’s effectiveness in lowering a participant’s desire to express anger physically, while decreasing the potential risk for physical violence. This pilot study demonstrated promising initial support for the DPEW as an alternative, preventative intervention for males at risk for intimate partner violence. Its strong preliminary results provide evidence for a larger RCT. The study’s results are limited by a reliance on self-report measures, the brevity of the intervention, and a small sample size.  相似文献   
960.
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