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   7348篇
  免费   236篇
各国政治   411篇
工人农民   240篇
世界政治   610篇
外交国际关系   290篇
法律   4210篇
中国政治   41篇
政治理论   1711篇
综合类   71篇
  2020年   96篇
  2019年   116篇
  2018年   172篇
  2017年   159篇
  2016年   158篇
  2015年   115篇
  2014年   124篇
  2013年   868篇
  2012年   162篇
  2011年   169篇
  2010年   160篇
  2009年   169篇
  2008年   171篇
  2007年   177篇
  2006年   196篇
  2005年   168篇
  2004年   165篇
  2003年   172篇
  2002年   158篇
  2001年   228篇
  2000年   196篇
  1999年   173篇
  1998年   110篇
  1997年   106篇
  1996年   77篇
  1995年   80篇
  1994年   76篇
  1993年   90篇
  1992年   127篇
  1991年   159篇
  1990年   137篇
  1989年   149篇
  1988年   142篇
  1987年   157篇
  1986年   146篇
  1985年   149篇
  1984年   142篇
  1983年   144篇
  1982年   103篇
  1981年   96篇
  1980年   96篇
  1979年   103篇
  1978年   81篇
  1977年   59篇
  1976年   68篇
  1975年   61篇
  1974年   69篇
  1973年   68篇
  1972年   55篇
  1969年   57篇
排序方式: 共有7584条查询结果,搜索用时 15 毫秒
261.
Thomas  Diana W.  Thomas  Michael D. 《Public Choice》2020,182(3-4):443-457

The Olsonian distinction between roving and stationary bandits outlines the rationale behind the transition from anarchy to the emergence of the predatory state. This two-bandit model may, however, be expanded to include more bandit types. In the case of Viking Age England, local English kings were unable to monopolize violence and defend their realms against competing Viking raiders. As the Vikings’ time horizon grew, so did the accumulated value of more formal taxation, and bandit types evolved in four steps. The first step is the Olsonian roving bandit, who executed Viking hit-and-run attacks and plunders during the second half of the tenth century. The second step is the gafol bandit; gafol is payment for leaving, paid to, among others, Swein Forkbeard. The third step is the heregeld bandit; heregeld is a tax to support an army for hire; most notably Thorkell the Tall’s. The fourth step is the Olsonian stationary bandit, i.e. the strongest military leader among the Vikings, Cnut the Great, settled down as the new king. Overall, the Olsonian two-bandit model can be expanded to a four-bandit staircase model, in which the new gafol and heregeld bandit types explain the steps from anarchy and short-run raiding to long-run formal taxation in a predatory state.

  相似文献   
262.
Straka  John W.  Straka  Brenda C. 《Policy Sciences》2020,53(4):779-802
Policy Sciences - Persistent policy failures have been examined in recent years with a focus on the role of political systems. We evaluate the growth of dysfunctional policymaking in the U.S. and...  相似文献   
263.
Our study contributes to the search for the elusive catalytic effect of International Monetary Fund (IMF) lending on inflows of foreign direct investment (FDI). Recent scholarship has found that the catalytic effect is conditional on political regime and program stringency. We contribute to this literature by developing and testing a theory which describes how the catalytic effect also varies by economic sector. This is a departure from existing studies, which have tended to focus on aggregate FDI flows after crises. Our findings corroborate previous research, which finds that in general IMF lending has a substantial and negative effect on FDI. However, we find that the negative effect is concentrated in sectors that are highly dependent on external capital and have low sunk costs in the host country. Our findings are robust to several alternative explanations common in IMF literature, namely the importance of IMF program design and the ability of governments to make credible commitments to reform. Substantively, our findings suggest that investors are more likely to use IMF lending as an escape hatch in countries where FDI is dependent on external capital and has low sunk costs.  相似文献   
264.
Journal of Youth and Adolescence - The development of social behavior could be affected by stressful parenting. The mineralocorticoid receptor, one of the two main receptors for the stress hormone...  相似文献   
265.
Journal of Youth and Adolescence - School-based mental health intervention programs have demonstrated efficacy for the prevention and reduction of depressive symptoms, though the effect tends to be...  相似文献   
266.
Journal of Youth and Adolescence - Dual identity (e.g., strong ethnic and national identity) is a psychological resource for minority groups, but how it develops during adolescence is less clear....  相似文献   
267.
Given that minority ethno-political organizations are generally weaker than states yet seek to change their policies or remove the ruling regime from power, why would negotiation occur? States prefer to ignore or repress such organizations, which typically have little to offer in return amidst negotiations that can legitimize them while delegitimizing the state. When a challenging organization establishes governing structures and controls movement in part of a state's territory, however, it can easily inflict significant economic and political costs on the state while also possessing a valuable asset to exchange for concessions. An organization with territorial control cannot be ignored, while the state will have a strong incentive to negotiate before the state loses more face, the group gains more legitimacy, neighboring states are more likely to invade, and the international community is more likely to formally recognize any facts on the ground as a new status quo. Our analysis of 118 organizations in the Middle East and North Africa from 1980–2004 reveals that territorial control is the most important determinant of intrastate negotiation. In regards to existing scholarship, this suggests that a certain type of successful violence works—not all violence and not only nonviolence—while certain types of strong organizations—those that control territory—are more likely to reach negotiations with the state than weak ones.  相似文献   
268.
Two cross-sectional studies investigated media influences on adolescents’ substance use and intentions to use substances in the context of exposure to parental and peer risk and protective factors. A total of 729 middle school students (n = 351, 59% female in Study 1; n = 378, 43% female in Study 2) completed self-report questionnaires. The sample in Study 1 was primarily African-American (52%) and the sample in Study 2 was primarily Caucasian (63%). Across the two studies, blocks of media-related cognitions made unique contributions to the prediction of adolescents’ current substance use and intentions to use substances in the future above and beyond self-reported peer and parental influences. Specifically, identification with and perceived similarity to media messages were positively associated with adolescents’ current substance use and intentions to use substances in the future, and critical thinking about media messages and media message deconstruction skills were negatively associated with adolescents’ intention to use substances in the future. Further, peer influence variables (e.g., peer pressure, social norms, peer substance use) acted as risk factors, and for the most part, parental influence variables (e.g., parental pressure to not use, perceived parental reaction) acted as protective factors. These findings highlight the importance of developing an increased understanding of the role of media messages and media literacy education in the prevention of substance use behaviors in adolescence.  相似文献   
269.
This study examined the effects of neighborhood context on juvenile recidivism to determine if neighborhoods influence the likelihood of reoffending. Although a large body of literature exists regarding the impact of environmental factors on delinquency, very little is known about the effects of these factors on juvenile recidivism. The sample analyzed includes 7,061 delinquent male juveniles committed to community-based programs in Philadelphia, of which 74% are Black, 13% Hispanic, and 11% White. Since sample youths were nested in neighborhoods, a hierarchical generalized linear model was employed to predict recidivism across three general categories of recidivism offenses: drug, violent, and property. Results indicate that predictors vary across the types of offenses and that drug offending differs from property and violent offending. Neighborhood-level factors were found to influence drug offense recidivism, but were not significant predictors of violent offenses, property offenses, or an aggregated recidivism measure, despite contrary expectations. Implications stemming from the finding that neighborhood context influences only juvenile drug recidivism are discussed.  相似文献   
270.
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