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In this paper we investigate the dynamics of chartsuccess in the U.K. pre-recorded popular music industryover the period 1980 to 1993 using the British albumchart listings. We find that the incidence of chartsuccess is substantially skewed to the right, whethermeasured by total weeks spent per artist, averageweeks spent per album, or the total number of albumslisted per artist. We subsequently investigatepossible determinants of the length of chart survivalof albums in order to determine what may be drivingthe observed skewness. Our results indicate that thetype of album, seasonal demand, and initial popularityplay an important role in ensuring continued chartlisting of an album. 相似文献
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Pamela D. Tucker 《Journal of Personnel Evaluation in Education》1997,11(2):103-126
The major purpose of this study was to assess the presence of evaluation system components that assist principals in responding to incompetent teachers. According to Virginia principals, 5 per cent of the teachers in their schools were incompetent; however, only 2.65 per cent were documented formally as being incompetent. The typical principal with a staff of 100 teachers identifies 1.53 incompetent tenured teachers per year and remediates 0.68 teacher, encourages 0.37 teacher to resign or retire, reassigns 0.29 teacher, and recommends dismissal for 0.10 teacher. The four evaluation system components of remedial procedures, evaluation criteria, evaluator training, and organizational commitment were found to predict 69 per cent of the variance in the principals' effectiveness rating of their evaluation systems, but none of the evaluation system components were found to predict administrative responsiveness to incompetence. Such findings suggest that principals and school systems are avoiding a serious problem that undermines the education of millions of children, staff morale, and the publics perception of education. 相似文献
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Richard P. Tucker 《Anatomical sciences education》2008,1(5):224-227
The University of California at Davis School of Medicine offers a prematriculation program to nontraditional students. As part of the program, students take a 7‐day course on the gross anatomy of the upper limb that concludes with a written examination and a practical examination based on prosections. Here, the performance of students who took the course from 2002 to 2004 (n = 48) is compared with their performance in the medical gross anatomy course as well as their performance on Step 1 of the United States Medical Licensing Examination (USMLE). Both rank in the prematriculation program's anatomy course and the score on the examination were correlated (significant at the 0.01 level) with performance on the medical gross anatomy midterm and final examinations, the overall final grade, and class rank. Performance in the prematriculation anatomy course was also correlated with the score on Step 1 of the USMLE (rank significant at the 0.02 level; examination score, significant at the 0.05 level). Students who took the prematriculation course who eventually withdrew, were dismissed for academic reasons, or who failed the first attempt at the Step 1 of the licensing exam (n = 5) had a significantly lower score (77.6 ± 11.1; P < 0.05) on the prematriculation examination than did successful prematriculation students (86.2 ± 7.9). Thus, a gross anatomy examination following a short prematriculation course can be a predictor not only of medical student performance in anatomy, but also of performance on a standardized licensing examination. Anat Sci Ed 1:224–227, 2008. © 2008 American Association of Anatomists. 相似文献