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   7241篇
  免费   170篇
各国政治   379篇
工人农民   192篇
世界政治   458篇
外交国际关系   278篇
法律   4583篇
中国共产党   1篇
中国政治   19篇
政治理论   1409篇
综合类   92篇
  2020年   61篇
  2019年   81篇
  2018年   121篇
  2017年   131篇
  2016年   151篇
  2015年   109篇
  2014年   126篇
  2013年   772篇
  2012年   199篇
  2011年   194篇
  2010年   153篇
  2009年   162篇
  2008年   194篇
  2007年   172篇
  2006年   184篇
  2005年   144篇
  2004年   149篇
  2003年   154篇
  2002年   160篇
  2001年   302篇
  2000年   275篇
  1999年   219篇
  1998年   80篇
  1997年   102篇
  1996年   77篇
  1995年   80篇
  1994年   90篇
  1993年   79篇
  1992年   156篇
  1991年   175篇
  1990年   155篇
  1989年   170篇
  1988年   147篇
  1987年   141篇
  1986年   163篇
  1985年   126篇
  1984年   124篇
  1983年   129篇
  1982年   77篇
  1981年   75篇
  1980年   57篇
  1979年   110篇
  1978年   63篇
  1977年   61篇
  1976年   56篇
  1975年   66篇
  1974年   81篇
  1973年   76篇
  1972年   67篇
  1971年   60篇
排序方式: 共有7411条查询结果,搜索用时 328 毫秒
281.
Are internalizing and externalizing behavior problems interrelated via mutually reinforcing relationships (with each behavior leading to increases over time in levels of the other behavior) or mutually suppressing relationships (with each behavior leading to decreases over time in levels of the other behavior)? Past research on the directionality of these relationships has led to ambiguous results, particularly in adolescence. Furthermore, the extent to which prior results will generalize to adolescents with low levels of cognitive abilities remains unknown. This second limit is particularly important, given that these adolescents are known to present higher levels of externalizing and internalizing behaviors than their peers with average-to-high levels of cognitive abilities, and that the mechanisms involved in the reciprocal relationships between these two types of behaviors may differ across both populations. This study examines the directionality of the longitudinal relationships between externalizing and internalizing behavior problems as rated by teachers across three measurement waves (corresponding to Grades 8–10) in matched samples of 138 adolescents (34.78?% girls) with low levels of cognitive abilities and 556 adolescents (44.88?% girls) with average-to-high levels of cognitive abilities. The results showed that the measurement structure was fully equivalent across time periods and groups of adolescents, revealing high levels of developmental stability in both types of problems, and moderately high levels of cross-sectional associations. Levels of both internalizing and externalizing behaviors were higher among adolescents with low levels of cognitive abilities relative to those with average-to-high levels of cognitive abilities. Finally, the predictive analyses revealed negative reciprocal longitudinal relationships (i.e., mutually suppressing relationships) between externalizing and internalizing problems, a result that was replicated within samples of adolescents with low, and average-to-high levels of cognitive ability.  相似文献   
282.
In the second of our two-part review of Vladimir Lenin’s 1917 study of American agriculture, we extrapolate upon Alexander Chayanov’s neoliberal appropriation, Giovanni Arrighi’s treatment of partial proletarianization, the propagandistic “family farm,” agribusiness’s fluctuating territorial embeddedness, agriculture as an industry, and land and rent as commodities themselves. We finish by deploying Lenin’s alternate history as a Benjaminian détournement in the face of what now appear insurmountable obstacles. An alternate food future is not only possible, it is already underway.  相似文献   
283.
Policymakers have actively pursued urban renewal and dispersal programs to deconcentrate poverty in urban neighborhoods. Relocation strategies lead to new housing opportunities and may encourage employment opportunities for relocated residents if resourceful contacts and job information become more easily available after the move. This study provides an innovative evaluation of the early impacts of involuntary relocation programs in the Netherlands on the housing careers, earnings and employment rates of forced relocatees. It establishes a quasi-experimental design by employing unique longitudinal individual-level population registry data from Statistics Netherlands: forced relocatees are tracked and matched to a control group consisting of similar residents that were not forced to move. A difference-in-difference design shows that forced relocatees are living in less deprived neighborhoods after the move. However, we find no conclusive evidence that this upgrade in housing leads to more socioeconomic opportunities for the forced relocatees.  相似文献   
284.
285.
286.
3rd party intervention in interstate conflict is a common strategy for mitigating conflict and obtaining a final agreement. However, not all mediations are successful, leading to the development of a rich literature on the mechanisms which decrease the probability of failure in a 3rd-party intervention. Within this literature, some studies examine how a mediator’ behavior and incentives affect the result of the mediation. Virtually all these studies assume that the mediator is virtuous such that peace is the most desired outcome of a conflict for her. However, this study challenges this assumption and contends that a mediator can gain benefit from the conflict between disputants. If this benefit is adequately large to overcome the benefits of peace, then the mediator has enough incentive not to conduct the mediation toward a peaceful outcome. We develop a signaling game model to study this issue formally and test the proposed hypothesis empirically.  相似文献   
287.
This research analyzes the individual-level factors associated with public support for the private provision of public goods and services. Given that privatization requires the transfer of authority from public to private entities, we argue that beliefs about private companies are an important and overlooked source of heterogeneity in explaining public policy preferences toward privatization. We test this expectation using survey data from the 2014 Cooperative Congressional Election Study. We find that support for privatization is associated with positive beliefs about the motivation of private companies and with favorable views about corporate accountability relative to the accountability of government. Opposition to privatization is associated with beliefs about corporate influence in politics. Preferences for limited government are also associated with support for privatization. These results highlight the potential for beliefs about private companies to serve as a group heuristic in political reasoning and the ability of citizens to make reasoned choices on complex public policy issues.  相似文献   
288.
Supreme Court confirmation hearings have been famously called a “vapid and hollow charade” by Elena Kagan. Indeed, perceptions of nominees’ refusal to answer questions about pending cases, prominent political issues, or give any hint of their ideological leanings have become a cornerstone of the modern confirmation process. We investigate the extent to which this reticence to speak of their ideological views, or candor, influences how individuals evaluate the nominee. To this end, we present the results of a survey experiment which examines how support for a hypothetical Supreme Court nominee is affected by information, especially when a nominee is presented to be very forthright or very reticent in answering ideological questions during the confirmation hearings. We find that while partisan compatibility with the president is the main determinant of support for a nominee, nominees who refuse to answer ideological questions can bolster support from respondents who would not support them on partisan grounds. We supplement these findings with observational state-level support data from real nominees over the last 40 years.  相似文献   
289.
Why were American officials caught by surprise with the military coup and later revolution in Iraq on 14 July 1958? Drawing on American intelligence and diplomatic records as well as multilingual sources, this article argues that the US intelligence failure is the product of two factors: the collection of information from too few and too similar human sources of intelligence in Iraq’s ruling regime, and the unreceptivity of US officials to assessing new information and their unwillingness to update assessments of local Iraqi developments. It revisits America’s intelligence failure in Iraq and suggests important lessons for the study of intelligence.  相似文献   
290.
Many Unemployment Insurance (UI) recipients do not find new jobs before exhausting their benefits, even when benefits are extended during recessions. Using Survey of Income and Program Participation (SIPP) panel data covering the 2001 and 2007 to 2009 recessions and their aftermaths, we identify individuals whose jobless spells outlasted their UI benefits (exhaustees) and examine household income, program participation, and health‐related outcomes during the six months following UI exhaustion. For the average exhaustee, the loss of UI benefits is only slightly offset by increased participation in other safety net programs (e.g., food stamps), and family poverty rates rise substantially. Self‐reported disability also rises following UI exhaustion. These patterns do not vary dramatically across household demographic groups, broad income level prior to job loss, or the two business cycles. The results highlight the unique, important role of UI in the U.S. social safety net.  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