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   443篇
  免费   24篇
各国政治   14篇
工人农民   61篇
世界政治   51篇
外交国际关系   13篇
法律   265篇
中国政治   10篇
政治理论   51篇
综合类   2篇
  2024年   1篇
  2023年   4篇
  2022年   5篇
  2021年   3篇
  2020年   15篇
  2019年   14篇
  2018年   24篇
  2017年   16篇
  2016年   20篇
  2015年   12篇
  2014年   24篇
  2013年   66篇
  2012年   21篇
  2011年   12篇
  2010年   14篇
  2009年   28篇
  2008年   24篇
  2007年   28篇
  2006年   20篇
  2005年   25篇
  2004年   14篇
  2003年   12篇
  2002年   15篇
  2001年   5篇
  2000年   2篇
  1999年   7篇
  1998年   4篇
  1997年   3篇
  1996年   2篇
  1995年   1篇
  1994年   4篇
  1993年   2篇
  1992年   6篇
  1991年   5篇
  1990年   1篇
  1989年   1篇
  1988年   1篇
  1985年   2篇
  1984年   1篇
  1983年   1篇
  1980年   2篇
排序方式: 共有467条查询结果,搜索用时 31 毫秒
121.
In a world where goods and services (but also people, capital and ideas) are increasingly ignoring national borders, competition policy has emerged as a highly salient issue at the heart of international trade discussions. Aspects of competition policy, from cartels and monopolies to state aids and the liberalization of the utilities, have become a regular feature in the pages of the financial and legal press and have become identified as a central element in any government's policy towards industry and its drive for competitiveness. This article focuses on European Union merger control and although appreciative of the dominance of economics and law in competition policy, stresses the political dimension to competition policy. A government and public administration perspective is essential. This is in evidence in the type of regime, the commitment to enforcing the law, the role of discretion and issues such as transparency and democracy. The example of merger control is used to illustrate how the European Commission (EC) has emerged and operates as a genuinely federal actor in determining and shaping merger policy throughout the EU. In short, this article accounts for policy development, the decision making process and in particular the degree to which discretion and politicization underpin one of the most crucial aspects of economic regulation.  相似文献   
122.
In this study, 297 adolescents (141 eighth graders and 156 eleventh graders) were classified into 3 groups created from crossing scores of depressive symptoms and frequency of daily hassles: well adjusted, resilient, and vulnerable. A discriminant function analysis was performed to investigate group differences on self-esteem, social support, different strategies of coping, and different aspects of social life. The analysis revealed that self-esteem, problem-solving coping strategies, and antisocial and illegal activities with peers helped to discriminate groups: Well-adjusted adolescents had higher self-esteem than adolescents in the 2 other groups; in addition, resilient adolescents had higher self-esteem than vulnerable adolescents. For the second significant discriminating variables, antisocial and illegal activities with peers, both resilient and vulnerable adolescents had higher scores than well-adjusted adolescents. Finally, resilient adolescents had higher scores on problem-solving coping strategies than adolescents in the 2 other groups.  相似文献   
123.
Previous research has examined the influence of the abusive personality (Dutton, 1994a,b) on relationship dynamics. Men with high scores of abusive personality (borderline personality organization, anger and MCMI8: Negativity) generate more frequent and extreme forms of physical and emotional abuse in intimate relationships. Other lines of research have examined the role of these relationship features in influencing post-separation adjustment in women. The current study combines two data sets; one bearing on the first of these issues, the other on the second issue, in order to connect characteristics of the perpetrator's personality to post separation aspects of victim reaction. Substantial associations are found between abusive personality and relationship dynamics and between the latter and persistent attachment, trauma symptoms, and lowered self esteem in battered women.  相似文献   
124.
The present investigation examines mediated pathways from pubertal development to changes in depressive affect and aggression. Participants were 100 white girls who were between the ages of 10 and 14 (M=12.13, SD=.80); girls were from well-educated, middle- to upper-middle class families, and attended private schools in a major northeastern urban area. Three aspects of pubertal development were examined: (a) estradiol categories tapping gonadal maturation; (b) dehydroepiandrosterone sulfate (DHEAS) levels indicating adrenal maturation; and (c) pubertal timing (early vs. other). Three potential mediators were also examined: emotional arousal, attention difficulties, and negative life events. Tests of mediated models indicated that early pubertal timing predicted higher emotional arousal which subsequently predicted increased depressive affect. Negative life events, and possibly attention difficulties, mediated the associations of both estradiol category and DHEAS with aggression. These findings highlight the potential for more intensive investigation of gonadal and adrenal processes in explaining affective changes at puberty.
Julia A. Graber (Associate Professor)Email:
  相似文献   
125.
126.
Associations between hormonal and physical status and girls' depressive affect, aggressive affect, and delinquent behavior were studied over the course of one year. Seventy-two White girls, aged 10–14 at initial data collection, were seen twice. Endocrinological status (estradiol, luteinizing hormone [LH], folicle stimulating hormone [FSH], testosterone, and dehydroepiandosterone sulfate [DHEAS] at Time 1, physical development (menarche, secondary sexual characteristics) and maturational timing at Times 1 and 2 were used to predict self- and maternal reports of depressive affect, and self-reports of aggressive affect and delinquent behavior at Time 2. It was posited that initial endocrinological status, as represented by hormonal categories derived by Warren and Brooks-Gunn [(1989) Mood and Behavior at Adolescence: Evidence for Hormonal Factors, Journal of Clinical Endocrinology and Metabolism, Vol. 69, pp. 77–83] and reflecting estradiol, LH, and FSH levels, would be associated with affective expression and delinquent behavior one year later. DHEAS, however, was not expected to be associated with affective expression a year later as it is thought to be more indicative of adrenal changes that are in part environmentally mediated. Initial affective expression was hypothesized to account for more of the variation than prior hormonal status. Hormonal categories predicted depressive and aggressive affect a year later, while DHEAS, physical status, and maturational timing did not. Initial hormonal categories were associated with subsequent reports of delinquent behavior, although not after physical status or prior reports of delinquency were entered into the regression. Initial reports of affective expression accounted for a far greater proportion of the variance in aggressive affect and delinquent behavior than did hormonal or physical status.Received Ph.D. from Institute of Child Development, University of Minnesota. Research interests include the interpaly among developmental processes during the transitions into and out of adolescence.Received Ph.D. from University of Pennsylvania. Research interests include Girl's psychological adaptation to pubertal change, biosocial aspects of female reproductive events, development of biological and socially at risk children and adolescents.Research interests include: Reproductive endocrinology, anorexia nervosa, neuroendocrinology, adolescence.  相似文献   
127.
128.
In principle, experiments offer a straightforward method for social scientists to accurately estimate causal effects. However, scholars often unwittingly distort treatment effect estimates by conditioning on variables that could be affected by their experimental manipulation. Typical examples include controlling for posttreatment variables in statistical models, eliminating observations based on posttreatment criteria, or subsetting the data based on posttreatment variables. Though these modeling choices are intended to address common problems encountered when conducting experiments, they can bias estimates of causal effects. Moreover, problems associated with conditioning on posttreatment variables remain largely unrecognized in the field, which we show frequently publishes experimental studies using these practices in our discipline's most prestigious journals. We demonstrate the severity of experimental posttreatment bias analytically and document the magnitude of the potential distortions it induces using visualizations and reanalyses of real‐world data. We conclude by providing applied researchers with recommendations for best practice.  相似文献   
129.
130.
What housing and service interventions work best to reduce homelessness for families in the United States? The Family Options Study randomly assigned 2,282 families recruited in homeless shelters across 12 sites to priority access to one of three active interventions or to usual care in their communities. The interventions were long‐term rent subsidies, short‐term rent subsidies, and transitional housing in supervised programs with intensive psychosocial services. In two waves of follow‐up data collected 20 and 37 months later, priority access to long‐term rent subsidies reduced homelessness and food insecurity and improved other aspects of adult and child well‐being relative to usual care, at a cost 9 percent higher. The other interventions had little effect. The study provides support for the view that homelessness for most families is an economic problem that long‐term rent subsidies resolve and does not support the view that families must address psychosocial problems to succeed in housing. It has implications for focusing government resources on this important social problem.  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