全文获取类型
收费全文 | 261篇 |
免费 | 9篇 |
专业分类
各国政治 | 22篇 |
工人农民 | 8篇 |
世界政治 | 27篇 |
外交国际关系 | 12篇 |
法律 | 55篇 |
中国政治 | 2篇 |
政治理论 | 139篇 |
综合类 | 5篇 |
出版年
2020年 | 5篇 |
2018年 | 8篇 |
2017年 | 7篇 |
2016年 | 8篇 |
2015年 | 4篇 |
2014年 | 4篇 |
2013年 | 30篇 |
2012年 | 5篇 |
2011年 | 4篇 |
2009年 | 4篇 |
2008年 | 6篇 |
2007年 | 7篇 |
2006年 | 7篇 |
2005年 | 3篇 |
2004年 | 7篇 |
2003年 | 6篇 |
2002年 | 10篇 |
2001年 | 4篇 |
2000年 | 7篇 |
1999年 | 2篇 |
1998年 | 8篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1994年 | 6篇 |
1993年 | 3篇 |
1992年 | 8篇 |
1991年 | 3篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 3篇 |
1986年 | 4篇 |
1985年 | 5篇 |
1984年 | 6篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 7篇 |
1980年 | 3篇 |
1979年 | 5篇 |
1978年 | 6篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1974年 | 5篇 |
1973年 | 6篇 |
1972年 | 3篇 |
1970年 | 2篇 |
1969年 | 3篇 |
1968年 | 3篇 |
1967年 | 3篇 |
1966年 | 3篇 |
排序方式: 共有270条查询结果,搜索用时 31 毫秒
251.
Fred B. Bryant 《政策研究评论》1986,5(4):709-721
Because research synthesis enables one to determine either the overall effectiveness of different types of treatments, it is becoming increasingly popular as a tool in program evaluation. Numerous methodological problems arise, however, when research synthesis is applied to studies conducted in field settings. The present paper categorlzes and discusses these problems as being threats to either the (1) internal validity (whether one can draw conclusions about cause and effect), (2) statistical conclusion validity (whether one's inferential statistics are capable of detecting cause-and effect relationships, (3) construct validity (whether one's treatments and outcome measures are valid operationalizations of the independent and dependent variables of interest), or (4) external validity (whether one can generalize results to particular populations, settings, or time periods) of research synthesis (see Cook & Campbell, 1979). Specific recommendations are made for minimizing these threats to validity, In order to improve the quality of research synthesis in program evaluation. Finally, the validit framework is applied to an actual synthesis to identify strengths, weaknesses, and potential means of enhancing research quality. 相似文献
252.
ABSTRACT This paper explores the livelihoods, experiences and identities of immigrant informal traders and shopkeepers in the Buffalo City Metropolitan area, which encompasses the centres of East London, Mdantsane and King Williams Town. We primarily use a socio-spatial perspective to analyse informal activity, and offer a particular perspective on how informality has encouraged a type of ‘informal citizenry’ among traders. We argue that informal trading has a very particular history in the region, and that East London’s notoriety as a ‘border city’ and a regional frontier has created a fractured space, which is best expressed through the experiences of migrants and entrepreneurs. We point out that informality is a driver of economic empowerment and equality among traders, but also of xenophobia and difference. 相似文献
253.
254.
255.
256.
Stephen L. Gould Alan A. Oldaïl Fred Thompson 《Canadian public administration. Administration publique du Canada》1979,22(2):251-260
Abstract. This paper describes the consequences of an experiment conducted with four governmental programs intended to evaluate the utility of ZBB for improving public sector decision-making. The results of this experiment were mixed. On the one hand, we clearly observed greater participation by operating managers in the formulation of budgets. This, we were frequently told, had positive consequences for staff development and program planning. The zbb experiment also resulted in the generation of more and better information in support of budget requests. However, information has value only to the extent that it increases the probability that decision makers will choose better options than they would without it. In no case was it possible to identify changes in budget amounts or program content that might not have occurred following standard budgeting practices. We do not believe the absence of fiscal or program impact resulting from this experience is in any way conclusive evidence against zbb , but it should serve as a warning to the unwary or over-enthusiastic user. Sommaire. Cet article fait état d'une expérience conduite sur quatre programmes gouvernementaux dans le but d'évaluer l'utilité de la méthode zbb comme moyen d'améliorer le processus de décision à l'intérieur du secteur public. Les résultats de l'expérience sont partagés. D'une part, il apparaît évident que cette méthode suscite plus de participation chez les gestionnaires dans la formulation des budgets; cette participation accrue produit — nous a-t-on affirméà plusieurs reprises — des effets positifs sur le perfectionnement du personnel et sur la planification des programmes. L'expérience a eu aussi pour effet d'engendrer des informations plus nombreuses et de meilleure qualité aux fins de justification des demands budgétaires. Cependant, l'information n'a de valeur que dans la mesure où elle augmente la probabilité que de meilleurs choix seront effectués. Or, dans aucun cas, il n'a été possible d'identifier des changements dans les budgets alloués ou dans le contenu des programmes qui ne seraient pas survenus avec l'emploi des méthodes traditionnelles de préparation des budgets. Nous ne croyons pas que cette absence d'impact sur la fiscalité ou sur les programmes témoigne de façon concluante contre la méthode du zbb , mais c'est une mise en garde pour ceux qui seraient tentés de surestimer les avantages de cette méthode. 相似文献
257.
258.
259.
Robert M. Malow Jessy G. Dévieux Ligia Martinez Fred Peipman Barbara A. Lucenko Seth C. Kalichman 《Journal of family violence》2006,21(2):127-135
Epidemiological studies in the United States estimate HIV seroprevalence rates ranging between 4% and 23% for serious mentally ill adults (SMIA; i.e., schizophrenia, bipolar disorder, and other chronic disorders with psychotic features), with substantially greater estimates for risky sexual behaviors. Among the most consistent factors linked to HIV risk in non-SMIA populations is a history of emotional, physical, or sexual abuse. The current study examined the intersection of abuse history and HIV sexual risk behavior in SMIAs with a group of men (n = 64) and women (n = 115) recruited from eight geographically diverse and representative clinical sites around Florida. A cross-sectional interview revealed a high prevalence of alcohol and other drugs problems, as well as a history of emotional, physical, or sexual abuse in 75% of the participants, with 68% of these reporting multiple types of abuse. Compared to nonabused counterparts, those with a history of abuse reported significantly greater: (a) lifetime and current psychiatric symptoms, (b) recent unprotected sexual intercourse, and (c) crack cocaine, heroin, and marijuana use. No gender differences were detected in the associations of abuse history and sexual risk behaviors. These results underscore the need for HIV prevention efforts targeted to SMIAs and the critical importance of addressing abuse history in interventions with this underserved population. 相似文献
260.