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   735篇
  免费   31篇
各国政治   35篇
工人农民   20篇
世界政治   91篇
外交国际关系   17篇
法律   339篇
中国共产党   1篇
中国政治   8篇
政治理论   245篇
综合类   10篇
  2020年   5篇
  2019年   9篇
  2018年   17篇
  2017年   25篇
  2016年   16篇
  2015年   10篇
  2014年   18篇
  2013年   121篇
  2012年   14篇
  2011年   17篇
  2010年   28篇
  2009年   20篇
  2008年   16篇
  2007年   24篇
  2006年   16篇
  2005年   29篇
  2004年   30篇
  2003年   13篇
  2002年   23篇
  2001年   7篇
  2000年   19篇
  1999年   13篇
  1998年   22篇
  1997年   13篇
  1996年   6篇
  1995年   16篇
  1994年   11篇
  1993年   10篇
  1992年   15篇
  1991年   12篇
  1990年   9篇
  1989年   9篇
  1988年   12篇
  1987年   18篇
  1986年   12篇
  1985年   10篇
  1984年   12篇
  1983年   9篇
  1982年   6篇
  1981年   15篇
  1980年   7篇
  1979年   5篇
  1978年   7篇
  1977年   8篇
  1976年   8篇
  1975年   3篇
  1974年   2篇
  1973年   3篇
  1972年   3篇
  1965年   2篇
排序方式: 共有766条查询结果,搜索用时 15 毫秒
51.
52.
A recently completed survey of British manufacturing investment in 14 anglophone African countries indicates that there has been major disinvestment during the last five years. This process of corporate disengagement is occuring despite concerted attempts by African governments to improve the overall investment climate for both national and foreign investors. The article analyses the pattern of disinvestment by country and industrial sector and considers some of the key causal factors.  相似文献   
53.
54.
It is widely recognized that interest groups affect both microeconomic and macroeconomic outcomes. However, few researchers have attempted to discern empirically the factors that contribute to interest group activity. This paper provides a test of several theories of group formation in a panel setting. A nation’s stability, socioeconomic development, political system, size, and diversity all appear to contribute to interest group formation, as predicted by theory.  相似文献   
55.
56.
Parental reports of adolescent substance use were compared to the adolescents' self-reports using identical scales. Congruence was defined as exact agreement on whether adolescents were current users, ex-users, or never-users. Both parents were found to be less accurate in predicting their adolescents' alcohol use compared to cigarette or marijuana use. Single mothers were significantly less likely to be congruent than were mothers from two-parent households. Mother and father congruence on all substances was unrelated to the adolescent's sex, race, or after school employment. For both parents, congruence for adolescent marijuana use was significantly related to the age and GPA of the adolescent. Congruence may also reflect important properties of family functioning, as significant relations were found between both adolescent and parent ratings of family cohesion and parent-adolescent congruence on perceptions of marijuana use.This research was supported by Grant DA03706 from the National Institute of Drug Abuse (Hyman Hops, Principal Investigator).Jennifer Langhinrichsen is a doctoral candidate in psychology interested in adolescent and family interactions. The other authors are psychologists or data analysts working on family influences on substance use and mental health.  相似文献   
57.
This paper investigates the effectiveness of New Jersey's mandatory belt use law (MUL) by testing specifically for: (1) a safety effect, and (2) a risk-compensation effect that could offset (in part) any safety impact. The main findings are that injury severity declined significantly in the 22 months following implementation of the MUL; but that accident frequency increased significantly. The increase in accidents may be explained only partially by increased driving mileage. These findings suggest that the real safety effect of the law may have been diluted by risk-compensating behavior.This paper is based on a study conducted for the New Jersey Office of Highway Traffic Safety by the Rutgers University Bureau of Economic Research. We are grateful to William Ascher and two referees for useful comments.  相似文献   
58.
This article examines the problem of extending access to potable water through conventionally controlled government services and describes the roles of non-governmental organizations and community management associations in improving service delivery and maintaining local water systems. Six sets of factors that are crucial to the success of community management are identified: adequate incentives, sufficient skills and resources, appropriate processes for water systems operations and maintenance, effective interorganizational relationships, appropriate technology, and effective systems of monitoring, evaluation and feedback. The components that must be taken into consideration in designing and implementing programmes for decentralizing water supply systems through community management are set out.  相似文献   
59.
60.
The literature on incumbency advantage has focused on margin as an indicator for electoral security. But while electoral margin is a goodex ante measure, it is a poorex post measure of security. Further, existing work has not integrated the choice of retirement with changes in the level of security. To improve the specification and definition of “marginality”, a multinomial LOGIT model is proposed where the dependent variable is categorical. Account is therefore taken of all the ways a Representative's term in office can end, including reelection, defeat, retirement, or pursuit of other office. The sample includes all U.S. Representatives elected for the first time between 1948 and 1978. The results indicate that (1) margin in the previous election is a significantex ante proxy for the probability of electoral defeat, and (2) while the electoral safety of all incumbents in the House has been increased, the increases are greater for members elected for the first time in the period since 1965.  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