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   23217篇
  免费   1286篇
各国政治   908篇
工人农民   1000篇
世界政治   1596篇
外交国际关系   728篇
法律   15926篇
中国共产党   2篇
中国政治   143篇
政治理论   4074篇
综合类   126篇
  2021年   117篇
  2020年   480篇
  2019年   523篇
  2018年   662篇
  2017年   700篇
  2016年   788篇
  2015年   578篇
  2014年   649篇
  2013年   2340篇
  2012年   613篇
  2011年   661篇
  2010年   660篇
  2009年   681篇
  2008年   664篇
  2007年   680篇
  2006年   696篇
  2005年   567篇
  2004年   576篇
  2003年   521篇
  2002年   536篇
  2001年   890篇
  2000年   809篇
  1999年   647篇
  1998年   311篇
  1997年   236篇
  1996年   267篇
  1995年   252篇
  1994年   235篇
  1993年   232篇
  1992年   430篇
  1991年   439篇
  1990年   406篇
  1989年   408篇
  1988年   419篇
  1987年   384篇
  1986年   431篇
  1985年   436篇
  1984年   341篇
  1983年   341篇
  1982年   259篇
  1981年   237篇
  1980年   203篇
  1979年   294篇
  1978年   176篇
  1977年   147篇
  1976年   126篇
  1975年   131篇
  1974年   176篇
  1973年   134篇
  1971年   111篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
891.
This essay, adapted from his Inaugural Lecture as the Simon Professor at Lafayette, was dedicated to the memory of Aaron Wildavsky.  相似文献   
892.
893.
David M. Levy 《Public Choice》1994,81(3-4):263-275
Suppose the optimizing consumer only has local information, then what? Obviously, there will be a random element of consumption. The link between the frequency distribution of consumption by person and preference surface is worked out. Under convex preferences there will be a unimodal distribution and conversely. A local optimizing theory of addictive behavior is developed from nonconvex preferences. The resulting bimodal distribution of consumption implies a nonrobust outcome for median voter politics. Such a local optimizing model of addiction is compared with globally optimizing models of addiction.  相似文献   
894.
Young adult adoptees and nonadoptees provided retrospective accounts of family relationships from infancy to young adulthood. Adoptive families were portrayed as more cohesive and adaptable than nonadoptive families. Adoptive fathers were recalled as being closer to their children then were nonadoptive fathers in the years preceding adolescence. Within the same time frame, adoptive mothers were drawn in a less hierarchical relation to their children than were other parents. Also, while adoptive males saw themselves as presently unconnected to their adoptive parents, adopted females perceived themselves as more connected to their parents in the present than any other period of time. Openness of communication and acknowledgment of difference in adoptive family formation varied with graphic retrospective accounts. Results were considered in terms of discontinuities between reported observations of adoptive families and adoptees' personal reflections on family developmental history.Received PhD in clinical psychology from the State University of New York at Stony Book. Research interests: adoptive family relations, social attributions of children and their parents.Received M.A. from the University of Guelph, Guelph, Ontario, Canada N1G 2W1. Research interests: development of identity, adoption.Received Ph.D. in social psychology from the University of Toronto. Research interests: attribution, jealousy, parents' theories of child psychology.  相似文献   
895.
896.
897.
Eighth graders, 11th graders, and college sophomores wrote open-ended essays that characterized their own approaches to moral reasoning. Their essays were scored for the presence of various themes. Students also responded to three dilemmas from the Defining Issues Test (Rest, 1979). Students then rated their own use of justice and care orientations in moral reasoning, using a previously developed instrument (Ford and Lowery, 1986; Lyons, 1983). Characterizations of moral reasoning became more multifaceted and thorough with grade, and correlated with many traditional measures of moral reasoning. Males and females showed some, but relatively few, differences in characterizing their own moral reasoning, although females tended to respond more thoroughly to the open-ended task. Gender differences, when they occurred, were mostly found on measures that assessed so-called feminine issues or concerns, but not on traditional measures of moral reasoning. Characterizations of moral reasoning clustered into five dimensions, raising questions about the utility of the constructs of justice and care orientations.The first and third authors received financial support from a Ford-Mellon grant made to Carleton College. Results of this study were presented at the 1990 meeting of the Society for Research in Adolescence.Received Ph.D. in Psychology and M.S.E. in Computer and Information Sciences at the University of Pennsylvania, and has research interests in the development of reasoning skills, decision making, and conceptual development.Received Ph.D. in Counseling and Guidance from the University of Wisconsin, Madison, and has research interests in adolescent development and adolescent psychopathology.Received B.A. in Psychology from Carleton College in 1990. Has interests in adolescence and chemical dependence.  相似文献   
898.
The purpose of this study was to test hypotheses regarding (1) relations among negative affect and hormones of gonadal and adrenal origin in young adolescents, at three times of measurement, over a one-year period; and (2) stability of negative affect. The sample consisted of 10- to 14-year-old boys (N=56) and 9- to 14-year-old girls (N=52). The adolescents were assessed three times at 6-month intervals over one year. Serum levels of gonadotropins, gonadal steroids, adrenal androgens, and cortisol were assessed, as well as stage of pubertal development (Tanner criteria). The negative affect assessments consisted of self-report questionnaire and interview measures of anxiety and depressive affect, as well as mother reports of internalizing behavior problems. In the concurrent (cross-sectional) analyses, boys reporting higher levels of negative affect tended to be those at higher genital stage or older age, with lower testosterone and cortisol levels and lower dehydroepian-drosterone sulphate levels. In the longitudinal analyses, negative affect, and to a lesser extent hormone levels at the first time of measurement predicted negative affect 12 months later. The findings suggest that puberty-related hormone levels should be considered along with psychological characteristics in examining the processes involved in the development of negative affect during the pubertal years.Received Ph.D. from The Pennsylvania State University. Research interests include hormone-behavior interactions and emotional development.Received Ph.D. from The Pennsylvania State University. Research interests include neuroendocrinology and adolescent depression.Recieved M.D. from Athens University. Research interests include hypothalamic releasing factors and stress.  相似文献   
899.
This paper explores the organizational strategies used to represent information about political actors in memory, and it illustrates the usefulness of a specific measure, the adjusted ratio of clustering score (ARC), for inferring memory structure. Assuming the operation of an associative network model, we argue that information about a political actor can be organized along three distinct dimensions: attribute type (differentiating between issue positions and personal attributes), partisanship (differentiating between characteristics typical of Republicans and Democrats), and evaluative type (differentiating between positively and negatively evaluated attributes). The results of a laboratory study indicate that organization along the attribute type dimension was most common, with some evidence of partisan organization. There was no evidence of organization along the evaluative dimension. The implications of the study for understanding individual differences in political reasoning, and the consequences of memory organization strategies, are discussed.  相似文献   
900.
The effects of polls on public opinion and voting behavior have begun to attract considerable attention. However, aside from experimental studies and research on exit polls, the impact of preelection polls has not received adequate analysis. This paper investigates whether exposure to polls released during the campaign influences voter choices and how the electoral context of referendum versus candidate elections makes a difference in terms of polling effects. These questions were addressed in a cross-election comparison of the 1980 presidential campaign and a 1986 state referendum on the right-to-life issue. Basically, I found significant effects during the referendum, but weak effects in the presidential general election.  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