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   1110篇
  免费   47篇
各国政治   65篇
工人农民   162篇
世界政治   77篇
外交国际关系   45篇
法律   584篇
中国政治   17篇
政治理论   202篇
综合类   5篇
  2023年   11篇
  2022年   8篇
  2021年   8篇
  2020年   32篇
  2019年   33篇
  2018年   58篇
  2017年   50篇
  2016年   45篇
  2015年   38篇
  2014年   33篇
  2013年   136篇
  2012年   33篇
  2011年   36篇
  2010年   26篇
  2009年   44篇
  2008年   36篇
  2007年   46篇
  2006年   36篇
  2005年   40篇
  2004年   44篇
  2003年   30篇
  2002年   34篇
  2001年   14篇
  2000年   22篇
  1999年   14篇
  1998年   13篇
  1997年   13篇
  1996年   16篇
  1995年   9篇
  1994年   15篇
  1993年   6篇
  1992年   11篇
  1991年   18篇
  1990年   14篇
  1989年   11篇
  1988年   7篇
  1987年   5篇
  1986年   17篇
  1985年   15篇
  1984年   10篇
  1983年   11篇
  1982年   12篇
  1981年   7篇
  1980年   9篇
  1979年   4篇
  1978年   5篇
  1977年   6篇
  1975年   4篇
  1974年   5篇
  1970年   2篇
排序方式: 共有1157条查询结果,搜索用时 31 毫秒
921.
922.
ABSTRACT

This paper analyzes the relative roles of cultural and structural factors in the emergence and solidification of taxi driving as an ethnic occupational niche among Ethiopian immigrants in the Washington DC metropolitan area within the wider context of globalization and immigrant integration. An ethnic occupational niche is the concentration and specialization of members of an ethnic group in a particular occupational activity. Using data from the US Census Bureau and in-depth interviews with 25 (male) Ethiopian cab drivers and three Ethiopian cab company owners, it examines the factors that affected the entrance of first-generation Ethiopian immigrants in this occupation since the 1980s. This research demonstrates that mixed embeddedness or the interplay of structural factors such as blocked mobility as well as cultural factors such as the strong social networks that exist among Ethiopian immigrants were important in the induction of new immigrants into taxicab driving. The demographic composition of the Washington metropolitan area and policies of the DC Taxicab Commission that allow for fairly easy entry of new drivers in the taxicab business also facilitated the emergence of this occupational niche.  相似文献   
923.
Terrorist organizations’ physical safe havens continue to shape the terrorist threat to the United States by extending the groups’ longevity and increasing the threat they pose. As a result, eliminating terrorist safe havens has been a key component of U.S. counterterrorism policy since at least 2001. However, some scholars challenged the post-9/11 policy consensus that terrorists find sanctuary in weak states and so-called ungoverned spaces. This article seeks to bridge this gap between scholarship and policy by offering a typology for disaggregating different kinds of terrorist safe havens. Our typology operates on two axes based on host government will (i.e., the host government's posture toward each group with haven inside its borders), as well as government capability, (specifically whether the host government possesses the specific capabilities needed to oust each group). This intersection of will and capability produces three types of havens. We briefly illustrate each type of haven using the exemplar case study of Pakistan—a location often described as an overarching safe haven, but which is actually home to several sanctuaries—and offer policy recommendations for addressing them. A need exists to disaggregate and identify how the United States can approach haven elimination. This typology and the analysis that stems from it offer a starting point for devising such strategies.  相似文献   
924.
Racial discrimination has serious negative consequences for the adjustment of African American adolescents. Taking an ecological approach, this study examined the linkages between perceived racial discrimination within and outside of the neighborhood and urban adolescents’ externalizing and internalizing behaviors, and tested whether neighborhood cohesion operated as a protective factor. Data came from 461 African American adolescents (mean age = 15.24 years, SD = 1.56; 50 % female) participating in the Project on Human Development in Chicago Neighborhoods. Multilevel models revealed that perceived discrimination within youth’s neighborhoods was positively related to externalizing, and discrimination both within and outside of youth’s neighborhoods predicted greater internalizing problems. Neighborhood cohesion moderated the association between within-neighborhood discrimination and externalizing. Specifically, high neighborhood cohesion attenuated the association between within-neighborhood discrimination and externalizing. The discussion centers on the implications of proximal stressors and neighborhood cohesion for African American adolescents’ adjustment.  相似文献   
925.
One of the most consistent findings in developmental criminology is the “age–crime curve”—the observation that criminal behavior increases in adolescence and decreases in adulthood. Recently, Brown and Males (Justice Policy J 8:1–30, 2011) conducted an analysis of aggregate arrest, poverty, and population data from California and concluded that the widely-observed adolescent peak in rates of offending is not a consequence of developmental factors, but rather an artifact of age differences in economic status. Youngsters, they argue, offend more than adults because they are poorer than adults. The present study challenges Brown and Males’ proposition by analyzing data from the National Longitudinal Study of Youth (NLSY97; N = 8,984; 51 % female; 26 % Black, 21 % Hispanic, 52 % non-Black, non-Hispanic; ages 12–18 at Wave 1), which collected measures of criminal behavior and economic status at multiple time points. Consistent with scores of other studies, we find that criminal offending peaks in adolescence, even after controlling for variation in economic status. Our findings both counter Brown and Males’ claim that the age–crime curve is illusory and underscore the danger of drawing inferences about individual behavior from analysis of aggregated data.  相似文献   
926.
927.
Since the 1990’s, implementation of zero tolerance policies in schools has led to increased use of school suspension and expulsion as disciplinary techniques for students with varying degrees of infractions. An unintended consequence of zero tolerance policies is that school suspension or expulsion may increase risk for contact with the juvenile justice system. In the present study, we test how forced absence from school via suspension or expulsion and chosen absence from school (truancy) are associated with the likelihood of being arrested. Using month-level data from 6,636 months from a longitudinal study of delinquent adolescents (N = 1,354; 13.5 % female; 41.5 % Black, 33.5 % Hispanic-American, 20.2 % White), we compare the likelihood of being arrested, within individuals, for months when youth were and were not suspended or expelled from school and for months when youth were and were not truant. Finally, we test if these associations were moderated by stable demographic characteristics (sex, race, age, history of problem behaviors) and time-varying contextual factors (peer delinquency, parental monitoring, and commitment to school). Being suspended or expelled from school increased the likelihood of arrest in that same month and this effect was stronger among youth who did not have a history of behavior problems and when youth associated with less delinquent peers. Truancy independently contributed to the likelihood of arrest, but this association was explained by differences in parental monitoring and school commitment. Thus, school disciplinary action places youth at risk for involvement in the juvenile justice system and this may be especially true for less risky youth.  相似文献   
928.
The fact that disadvantaged people generally die younger and suffer more disease than those with more resources is gaining ground as a major policy concern in the United States. Yet we know little about how public values inform public opinion about policy interventions to address these disparities. This article presents findings from an exploratory study of the public's values and priorities as they relate to social inequalities in health. Forty-three subjects were presented with a scenario depicting health inequalities by social class and were given the opportunity to alter the distribution of health outcomes. Participants' responses fell into one of three distributive preferences: (1) prioritize the disadvantaged, (2) equalize health outcomes between advantaged and disadvantaged groups, and (3) equalize health resources between advantaged and disadvantaged groups. These equality preferences were reflected in participants' responses to a second, more complex scenario in which trade-offs with other health-related values - maximizing health and prioritizing the sickest - were introduced. In most cases, participants moderated their distributive preferences to accommodate these other health goals, particularly to prioritize the allocation of resources to the very sick regardless of their socioeconomic status.  相似文献   
929.
930.
Recent policies enacted regarding sex offenders include the formation of a publicly accessible sex offender registry, community notification, and residential restrictions. Often the motivation behind these policies is to get information out about sex offenders to community members so that these communities can effectively guard against any revictimization by the sex offenders among them. Theoretically, the premise for this type of legislation corresponds to relationships specified by routine activities theory. The theory states that if guardians can interrupt potential offenders as they are preying on suitable targets, these crimes-in-the-making will not occur. The present study assesses routine activities theory via a study of the presence of potential offenders (as measured by the number of registered sex offenders in the area), as well as community and resident characteristics that measure the presence and types of suitable targets and the existence of guardians and guardianship structures. We find that only the presence of certain types of suitable targets has an influence on the variation in the rate of sex offenses across these communities. Policy implications are discussed.  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