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91.
This paper investigates the impact of extending free school lunch to all students, regardless of income, on academic performance in New York City middle schools. Using a difference-in-differences design and unique longitudinal, student-level data, we derive credibly causal estimates of the impacts of “Universal Free Meals” (UFM) on test scores in English Language Arts (ELA) and mathematics, and participation in school lunch. We find UFM increases academic performance by as much as 0.083 standard deviations in math and 0.059 in ELA for non-poor students, with smaller, statistically significant effects of 0.032 and 0.027 standard deviations in math and ELA for poor students. Further, UFM increases participation in school lunch by roughly 11.0 percentage points for non-poor students and 5.4 percentage points for poor students. We then investigate the academic effects of school lunch participation per se, using UFM as an instrumental variable. Results indicate that increases in school lunch participation improve academic performance for both poor and non-poor students; an additional lunch every two weeks increases test scores by roughly 0.08 standard deviations in math and 0.07 standard deviations in ELA. Finally, we explore potential unintended consequences for student weight outcomes, finding no evidence that UFM increases the probability that students are obese or overweight. We also find no evidence of increases in average body mass index (BMI). Instead, we find some evidence that participation in school lunch improves weight outcomes for non-poor students. Results are robust to an array of alternative specifications and assumptions about the sample. 相似文献
92.
Thomas Schwartz 《Public Choice》2010,145(3-4):571-573
Contrary to Miller, Farquharson’s agenda trees do omit real parliamentary information. And the assumptions he uses to justify Farquharson’s definition of sincere (or naive) voting justify too little (e.g., he drops maximax) and rule out too much (e.g., non-pre-set agendas and principled sincere voting). 相似文献
93.
94.
Lita Linzer Schwartz 《Family Court Review》1994,32(1):72-83
Divorce mediators, attorneys, judges, and psychologists approach the issues in marriage dissolution from disparate vantage points. Legal niceties, actuarial acrobatics, and egosaving mechanisms tend to dominate the proceedings. Too often, however, some of the professionals have neither the training nor the experience to recognize the potential impact of such decisions on the children of divorce. The children rarely have an advocate whose sole task it is to make certain that their "best interests" are truly served. Questions are raised and suggestions for research are offered in an effort to reduce children's victimization and enable them to emerge as winners. 相似文献
95.
Delinquents are better managed in the juvenile court, though the adult system may be necessary for the few cases in which juvenile facilities and jurisdictional time remaining cannot adequately protect the public. 相似文献
96.
97.
Leanna Stiefel Amy Ellen Schwartz Ingrid Gould Ellen 《Journal of policy analysis and management》2007,26(1):7-30
We examine the size and distribution of the gap in test scores across races within New York City public schools and the factors that explain these gaps. While gaps are partially explained by differences in student characteristics, such as poverty, differences in schools attended are also important. At the same time, substantial within‐school gaps remain and are only partly explained by differences in academic preparation across students from different race groups. Controlling for differences in classrooms attended explains little of the remaining gap, suggesting little role for within‐school inequities in resources. There is some evidence that school characteristics matter. Race gaps are negatively correlated with school size—implying small schools may be helpful. In addition, the trade‐off between the size and experience of the teaching staff in urban schools may carry unintended consequences for within‐school race gaps. © 2006 by the Association for Public Policy Analysis and Management. 相似文献
98.
A. T. J. Matthews Ellaleen C. Williams Jerome Laulicht Russell B. Donnelly Irene Nordine Henry C. Lajewski Paul F. Peifer Gustave A. de Cocq Joseph E. Russo Martin L. Hoffman J. Walter Cobb Worthington Miner Charles H. Adair G. Kerry Smith Eugene P. Schwartz R. L. Meier David B. Booth 《Society》1964,1(5):2-2
99.
TWGDAM validation of the AmpFlSTR Profiler Plus and AmpFlSTR COfiler STR multiplex systems using capillary electrophoresis 总被引:3,自引:0,他引:3
LaFountain MJ Schwartz MB Svete PA Walkinshaw MA Buel E 《Journal of forensic sciences》2001,46(5):1191-1198
Prior to forensic implementation, a profiling system requires validation following the recommendations presented by the Technical Working Group on DNA Analysis Methods (TWGDAM). In this work two such systems, AmpFlSTR Profiler Plus and AmpFfSTR COfiler have been validated according to the guidelines provided by TWGDAM. Profiler Plus and COfiler simultaneously amplify nine and six STR loci respectively; both also amplify a portion of the amelogenin gene. Performance of the two STR multiplex systems under conditions set forth by TWGDAM was robust and reproducible, indicating that these systems are suitable for use in forensic analysis. Additionally, specific sections of the TWGDAM validation guidelines are especially valuable in terms of familiarizing users with particular limitations of the systems prior to taking on casework. 相似文献
100.
Despite many calls for integratedwoman abuse theories, few have made any suchattempts. Taking as a starting point thatgender blind and conservative theories maystill have some value, Hirschi's social bondtheory is examined with insights from feministmale peer support theory and other criticalperspectives. The goal is not a formal newtheory but rather a heuristic designed to showthe value of adding feminist insight to genderblind theory. Hirschi is turned upside downhere with an argument that attachment andinvolvement with conventional peers may in factpromulgate violence against women thecollege campuses when it is noted thatconventional institutions are patriarchal andpart of a rape culture. University groups(social fraternities, sports teams, etc.) mayenforce adherence through homophobia and grouppressure, while promoting a hypermasculineculture that encourages men to use coercion andforce to increase their count of sexualencounters. 相似文献