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Clotfelter Charles T.; Vigdor Jacob L.; Ladd Helen F. 《American Law and Economics Review》2006,8(2):347-389
Analyzing data for the 100 largest districts in the South andBorder states, we ask whether there is evidence of "resegregation"of school districts and whether levels of segregation can belinked to judicial decisions. We distinguish segregation measuresbased on racial isolation from those based on racial imbalance.Only one measure of racial isolation suggests that districtsin these regions experienced resegregation between 1994 and2004, and changes in this measure appear to be driven largelyby the rising nonwhite percentage in the student populationrather than by district policies. Although we find no time trendin racial imbalance over this period, we find that variationsin racial imbalance across districts are nonetheless associatedwith judicial declarations of unitary status, suggesting thatsegregation in schools might have declined had it not been forthe actions of federal courts. 相似文献
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Helen Weinreich 《Journal of youth and adolescence》1974,3(2):135-143
This paper is a brief critical review of the present state of research and theory in the area of moral development. It poses a number of questions about the theoretical basis of Kohlberg's six stages and examines the nature of the evidence to date and the limitations of knowledge in the area. The writer argues for an extension of this theoretical approach to moral development, with a greater emphasis on structure, and a reexamination of the psychological implications of the definition of moral used in this area of research.This paper is a revised version of a paper presented to the British Psychological Society Social Psychology Section Conference, Bristol, September 22, 1973.Has a master's degree in psychology and is currently working toward a Ph.D. in psychology in the field of moral development. 相似文献
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Acid scavengers are frequently used as stabilizer compounds in a variety of applications. When used to stabilize volatile compounds such as nerve agents, the lower volatility and higher stability of acid scavengers make them more persistent in a post-event forensic setting. Compound-specific isotope analysis of carbon, nitrogen, and hydrogen in three acid-scavenging compounds (N,N-diethylaniline, tributylamine, and triethylamine) were used as a tool for distinguishing between different samples. Combined analysis of multiple isotopes improved sample resolution, for instance differentiation between triethylamine samples improved from 80% based on carbon alone to 96% when combining with additional isotope data. The compound-specific methods developed here can be applied to instances where these compounds are not pure, such as when mixed with an agent or when found as a residue. Effective sample matching can be crucial for linking compounds at multiple event sites or linking a supply inventory to an event. 相似文献