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   610篇
  免费   30篇
各国政治   36篇
工人农民   74篇
世界政治   34篇
外交国际关系   16篇
法律   366篇
中国政治   6篇
政治理论   108篇
  2023年   5篇
  2022年   12篇
  2021年   12篇
  2020年   18篇
  2019年   27篇
  2018年   40篇
  2017年   27篇
  2016年   44篇
  2015年   12篇
  2014年   25篇
  2013年   100篇
  2012年   27篇
  2011年   30篇
  2010年   21篇
  2009年   19篇
  2008年   28篇
  2007年   32篇
  2006年   18篇
  2005年   20篇
  2004年   18篇
  2003年   18篇
  2002年   11篇
  2001年   5篇
  2000年   1篇
  1999年   3篇
  1998年   2篇
  1997年   6篇
  1996年   1篇
  1995年   6篇
  1994年   6篇
  1993年   3篇
  1992年   5篇
  1991年   1篇
  1990年   4篇
  1989年   3篇
  1988年   6篇
  1987年   3篇
  1986年   2篇
  1985年   4篇
  1984年   4篇
  1982年   3篇
  1979年   1篇
  1978年   1篇
  1977年   1篇
  1975年   1篇
  1974年   1篇
  1972年   1篇
  1971年   1篇
  1970年   1篇
排序方式: 共有640条查询结果,搜索用时 15 毫秒
621.
We present a 50‐year historical perspective of the nation's antipoverty efforts, describing the evolution of policy during four key periods since 1965. Over this half‐century, the initial heavy reliance on cash income support to poor families has eroded; increases in public support came largely in the form of in‐kind (e.g., Food Stamps) and tax‐related (e.g., the Earned Income Tax Credit) benefits. Work support and the supplementation of earnings substituted for direct support. These shifts eroded the safety net for the most disadvantaged in American society. Three poverty‐related analytical developments are also described. The rise of the Supplemental Poverty Measure (SPM)—taking account of noncash and tax‐related benefits—has corrected some of the serious weaknesses of the official poverty measure (OPM). The SPM measure indicates that the poverty rate has declined over time, rather than being essentially flat as the OPM implies. We also present snapshots of the composition of the poor population in the United States using both the OPM and the SPM, showing progress in reducing poverty overall and among specific socioeconomic subgroups since the beginning of the War on Poverty. Finally, we document the expenditure levels of numerous antipoverty programs that have accompanied the several phases of poverty policy and describe the effect of these efforts on the level of poverty. Although the effectiveness of government antipoverty transfers is debated, our findings indicate that the growth of antipoverty policies has reduced the overall level of poverty, with substantial reductions among the elderly, disabled, and blacks. However, the poverty rates for children, especially those living in single‐parent families, and families headed by a low‐skill, low‐education person, have increased. Rates of deep poverty (families living with less than one‐half of the poverty line) for the nonelderly population have not decreased, reflecting both the increasing labor market difficulties faced by the low‐skill population and the tilt of means‐tested benefits away from the poorest of the poor.  相似文献   
622.
The hawksbill sea turtle (Eretmochelys imbricata) is a highly endangered species, commonly poached for its ornate shell. “Tortoiseshell” products made from the shell are widely, although illegally, available in many countries. Hawksbills have a circumglobal distribution; thus, determining their origin is difficult, although genetic differences exist geographically. In the research presented, a procedure was developed to extract and amplify mitochondrial DNA from tortoiseshell items, in an effort to better understand where the species is being poached. Confiscated tortoiseshell items were obtained from the U.S. Fish and Wildlife Service, and DNA from 56 of them was analyzed. Multiple mitochondrial haplotypes were identified, including five not previously reported. Only one tortoiseshell item proved to be of Atlantic origin, while all others corresponded to genetic stocks in the Indo‐Pacific region. The developed methodology allows for unique, and previously unattainable, genetic information on the illegal poaching of sea turtles for the decorative tortoiseshell trade.  相似文献   
623.
624.
Using data from a national longitudinal survey of children referred to child protective services (NSCAW II), this article compares behavioral, child/caregiver relationship, and school performance outcomes for children residing in kinship and nonkinship settings. Up to three waves of data were gathered for each child. The analysis sample comprises 4,202 children and 10,881 observations. Two sets of regressions were completed. One represents family living settings using child-mean centered predictors while the other does so with dummy-coded variables. An advantage of the child-mean centered predictors is that omitted variables that vary between children but that are constant within each child do not introduce bias. The regressions using dummy-coded variables evidenced, on balance, somewhat better outcomes for kinship settings than for nonkinship ones. Good outcomes in these regressions were found for kinship adoption. Results with the child-mean centered regressions were more equivocal, though perhaps still favored kinship settings. Limitations and policy recommendations conclude the article.  相似文献   
625.

Relatively few studies have considered the impact of the COVID-19 pandemic on intimate partner violence (IPV) advocates or the agencies where they work. In this study, based on United States IPV advocates’ experiences working with survivors during the COVID-19 pandemic, we conducted interviews to explore: 1) personal challenges and resilience working as IPV advocates during the COVID-19 pandemic; 2) how agencies adapted to the pandemic to support IPV survivors and advocates; and 3) specific needs and challenges of culturally-specific agencies. We conducted semi-structured interviews with 53 IPV advocates from June to November 2020. Participants were included if they worked directly with survivors, identified as an IPV advocate, worked at a US-based agency, and spoke and understood English. We created a sampling matrix to ensure adequate representation from IPV advocates serving survivors from communities which have been marginalized. Interviews were conducted through a virtual platform by a trained member of the research team. We used an inductive thematic analysis approach, with weekly coding meetings to resolve discrepancies in coding. Five themes emerged from the data: 1) IPV advocates described how working as an IPV advocate during the COVID-19 pandemic impacted them personally; 2) agencies developed new methods of addressing IPV advocates’ needs; 3) agencies developed new solutions to address pandemic-related client needs; 4) transitioning advocacy work to virtual formats created challenges but also opportunities and; 5) pandemic limitations and impacts compounded pre-pandemic challenges for culturally specific agencies. IPV advocates are frontline workers who have played essential roles in adjusting services to meet survivor needs during the COVID-19 pandemic while simultaneously coping with pandemic impacts on themselves and their agencies. Developing inter-agency collaborations and promoting advocates’ safety and wellbeing during future public health crises will help support IPV survivors.

  相似文献   
626.
Critical Criminology - This study explored the perceptions of incarcerated women, housed in prison nursery units in three states, of the effects of the nursery units on their parenting and...  相似文献   
627.
628.
The presence of a sizeable expatriate African population constitutes a potentially exploitable, if undeveloped, resource that represents a significant developmental challenge for the continent. Problematically the global division of labour and power, as well as differences of region, class, generation, ethnicity and race, are not properly recognised within the existing scholarship or development policy. What is clear is that diasporas do have a substantial role to play in development on the African continent. Further theoretical and empirical investigation is necessary to investigate the practical significance, nature and content of diasporic identifications and activities. By setting these against the structural backdrop of the global economy and the closely associated ideology of globalisation, this paper seeks to provide a new basis for understanding the role of the diaspora in development. This has considerable policy implications as to which diasporic populations should be targeted for developmental purposes.  相似文献   
629.
Through an analysis of a unique and understudied unit within the US Department of Homeland Security (DHS), the Human Rights Violators and War Crimes Unit (HRVWCU, or “the Unit”), this article addresses the following theoretical and policy question: once someone has been admitted to the United States and granted permanent residency, or even citizenship, how does the law facilitate the reversal of that decision based on acts committed long ago and far away? We argue that the HRVWCU has created a significant new way to govern immigration through crime—specifically international crime—while simultaneously trying to ensure justice for mass atrocities through immigration law. In offering an overview of the Unit's origins and approach in blending international criminal law, domestic criminal law, and immigration law, we show how this Unit reflects an expansion of crimmigration in the United States and abroad. In order to illustrate the dilemma of internationalized crimmigration, the article focuses on the Unit's cases related to war crimes in Liberia and Bosnia, which have two very different (at least from the perspective of international criminal law) types of alleged perpetrators: those who allegedly gave orders and those who allegedly followed orders.  相似文献   
630.
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