全文获取类型
收费全文 | 2493篇 |
免费 | 79篇 |
专业分类
各国政治 | 157篇 |
工人农民 | 69篇 |
世界政治 | 227篇 |
外交国际关系 | 162篇 |
法律 | 1046篇 |
中国政治 | 18篇 |
政治理论 | 871篇 |
综合类 | 22篇 |
出版年
2023年 | 14篇 |
2020年 | 34篇 |
2019年 | 37篇 |
2018年 | 57篇 |
2017年 | 67篇 |
2016年 | 73篇 |
2015年 | 52篇 |
2014年 | 51篇 |
2013年 | 394篇 |
2012年 | 39篇 |
2011年 | 57篇 |
2010年 | 56篇 |
2009年 | 60篇 |
2008年 | 68篇 |
2007年 | 60篇 |
2006年 | 73篇 |
2005年 | 67篇 |
2004年 | 82篇 |
2003年 | 72篇 |
2002年 | 68篇 |
2001年 | 50篇 |
2000年 | 41篇 |
1999年 | 38篇 |
1998年 | 54篇 |
1997年 | 39篇 |
1996年 | 33篇 |
1995年 | 54篇 |
1994年 | 43篇 |
1993年 | 45篇 |
1992年 | 33篇 |
1991年 | 35篇 |
1990年 | 40篇 |
1989年 | 44篇 |
1988年 | 40篇 |
1987年 | 41篇 |
1986年 | 39篇 |
1985年 | 35篇 |
1984年 | 41篇 |
1983年 | 32篇 |
1982年 | 36篇 |
1981年 | 23篇 |
1980年 | 22篇 |
1978年 | 28篇 |
1977年 | 24篇 |
1976年 | 21篇 |
1975年 | 15篇 |
1974年 | 27篇 |
1973年 | 18篇 |
1969年 | 16篇 |
1968年 | 11篇 |
排序方式: 共有2572条查询结果,搜索用时 15 毫秒
51.
52.
53.
WHAT IS A “GOOD” SOCIAL NETWORK FOR POLICY IMPLEMENTATION? THE FLOW OF KNOW‐HOW FOR ORGANIZATIONAL CHANGE 下载免费PDF全文
Kenneth A. Frank William R. Penuel Ann Krause 《Journal of policy analysis and management》2015,34(2):378-402
This study concerns how intraorganizational networks affect the implementation of policies and practices in organizations. In particular, we attend to the role of the informal subgroup or clique in cultivating and distributing locally adapted and integrated knowledge, or know‐how. We develop two hypotheses based on the importance of intraorganizational coordination for an organization's capacity for change. The first emphasizes the importance of distributing know‐how evenly to potential recipient subgroups. The second emphasizes the importance of restricting know‐how to flow from high know‐how subgroups. We test our hypotheses with longitudinal network data in 21 schools, finding stronger support for the second hypothesis than the first. Our findings can help managers cultivate know‐how flows to contribute to organizational change. 相似文献
54.
55.
56.
57.
58.
Anne van Hoof Quinten A. W. Raaijmakers Yolanda van Beek William W. HaleIII Liesbeth Aleva 《Journal of youth and adolescence》2008,37(7):772-782
This study investigated a multi-mediation model of the relationship between bullying behavior, peer victimization, personal
identity, and family characteristics to adolescent depressive symptoms in 194 high school students, 12–18 years of age. In
the first model, peer victimization mediated the relation between bullying behavior and depressive symptoms. In the second
model, personal identity mediated the relation between peer victimization and depressive symptoms. In the final model, the
two mediation models were combined. The relative influence of family characteristics on all variables in the two mediation
models was studied using structural equation modeling. The results supported both mediation models and confirmed the influence
of family characteristics on all variables in the mediation models. This study indicates that victimization by one’s peers
has consequences for adolescents’ psychological health when their personal identity is affected. In addition, the study was
able to model several processes in which family characteristics were related to adolescent depressive symptoms. Moreover,
the final combined model (in which the two mediation models and the influence of family characteristics on all variables were
confirmed) explained half of the variance in adolescent depressive symptoms.
相似文献
Liesbeth AlevaEmail: |
59.
60.
Thomas D. Cook William R. Shadish Vivian C. Wong 《Journal of policy analysis and management》2008,27(4):724-750
This paper analyzes 12 recent within‐study comparisons contrasting causal estimates from a randomized experiment with those from an observational study sharing the same treatment group. The aim is to test whether different causal estimates result when a counterfactual group is formed, either with or without random assignment, and when statistical adjustments for selection are made in the group from which random assignment is absent. We identify three studies comparing experiments and regression‐discontinuity (RD) studies. They produce quite comparable causal estimates at points around the RD cutoff. We identify three other studies where the quasi‐experiment involves careful intact group matching on the pretest. Despite the logical possibility of hidden bias in this instance, all three cases also reproduce their experimental estimates, especially if the match is geographically local. We then identify two studies where the treatment and nonrandomized comparison groups manifestly differ at pretest but where the selection process into treatment is completely or very plausibly known. Here too, experimental results are recreated. Two of the remaining studies result in correspondent experimental and nonexperimental results under some circumstances but not others, while two others produce different experimental and nonexperimental estimates, though in each case the observational study was poorly designed and analyzed. Such evidence is more promising than what was achieved in past within‐study comparisons, most involving job training. Reasons for this difference are discussed. © 2008 by the Association for Public Policy Analysis and Management. 相似文献