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981.
This paper analyzes the relationships of schooling, the skill content of work experience, and different types of employment patterns with less‐skilled women's job quality outcomes. Survey data from employers and longitudinal data from former and current welfare recipients are used for the period 1997 to early 2002. The analysis of job quality is broadened beyond employment rates and wages measured at a point in time by including non‐wage attributes of compensation and aspects of jobs that affect future earnings potential. This study shows the extent to which lack of employment stability, job skills, and occupation‐specific experience impedes welfare recipients' abilities to obtain a “good job” or to transition into one from a “bad job.” The business cycle downturn has significantly negatively affected the job quality and job transition patterns of former and current recipients. © 2003 by the Association for Public Policy Analysis and Management. 相似文献
982.
Automated scanning electron microscopy coupled with image analysis and X-ray micro analysis was used to characterize a variety of gunshot residue (GSR) samples. More than 500 rounds of commercially available ammunition and six different types of hand gulls were used in the study of 17 GSR and 19 reference specimens. The individual particle X-ray composition was determined for 12 different elements. Elemental composition of GSR particles was highly variable but consistent with compounds mixed into or associated with a barium oxide matrix. When present in a specimen, GSR could be adequately characterized with automated procedures in less than an hour by restricting analyses to features larger than 2 microm. In "clean" samples, a higher resolution particle search was required to avoid reporting false negatives. Careful control of the back scattered electron signal strength threshold, by reference to a standard, was needed to ensure both time-efficient and accurate analyses. Samples collected from non-shooting subjects. active in a physical environment which contained firearms discharge residue were seen to be easily contaminated by sub-micron GSR particles. 相似文献
983.
984.
Psychiatric Disorders Associated with the Onset and Persistence of Bulimia Nervosa and Binge Eating Disorder During Adolescence 总被引:2,自引:0,他引:2
Zaider Talia I. Johnson Jeffrey G. Cockell Sarah J. 《Journal of youth and adolescence》2002,31(5):319-329
A prospective longitudinal study was conducted to investigate whether anxiety, depressive, personality, or substance use disorders increase risk for onset of bulimia nervosa (BN) or binge eating disorder (BED) during adolescence. Axis I and II psychiatric disorders were assessed in a primary care sample of 201 adolescents. Axis I disorders were reassessed 10 months later. Youths with dysthymic disorder were at elevated risk for the onset or recurrence of BN or BED after preexisting psychiatric disorders were controlled statistically. Problems with depression or anxiety tended to precede the onset of eating problems. In addition, youths with eating disorder symptoms were at elevated risk for the onset or recurrence of depressive disorders. These findings suggest that adolescents with chronic depressive symptoms may be at elevated risk for the development of BN or BED, and that adolescents with eating disorder symptoms may be at elevated risk for the development of depressive disorders. 相似文献
985.
Robert A. Johnson John P. Hoffmann S. Susan Su Dean R. Gerstein 《Journal of Quantitative Criminology》1997,13(4):429-467
Multilevel growth curve models provide a means of analyzing individual differences in the growth of deviance, allow a number of theories to be integrated in a single model, and can help to unify research on deviant/delinquent/criminal careers at different stages of the life cycle. Building on the distinction between population heterogeneity and state dependence as alternative explanations of persistent individual differences in deviance (Heckman, 1981; Nagin and Paternoster, 1991), we show that models with two levels can be used to represent and analyze a variety of criminological theories. The first level (level 1) uses repeated measurements on individuals to estimate individual-level growth curves. The second level treats the level 1 growth curve parameters (e.g., slope, intercept) as outcome variables and uses time-invariant factors to explain variation in these parameters across individuals. We illustrate this approach by estimating a model of growth in deviance drawn from Gottfredson and Hirschi's deviant propensity theory. An innovative feature is the assumption that adolescents' expected growth curves of deviance follow a classical Pearl-Verhulst logistic growth model (Pearl, 1930). The results suggest that five risk factors—parental psychiatric problems, lack of parental support, living arrangements with zero or one parent in residence, low family income, and male gender—have strongly positive effects on deviant propensity. For example, adolescents with no supportive parents, and no other risk factors, have expected asymptotic levels of deviance (peak levels attained at about age 18) that are about twice as high as those of adolescents with no risk factors. Yet more than two-thirds of the individual-level variability in growth curves is unexplained by the five risk factors. This unobserved heterogeneity would remain hidden in analyses using conventional structural equations models and the same explanatory variables. 相似文献
986.
987.
Forensic neuropsychology continues to grapple with critical determinations of response styles, including the assessment of malingering. The development of the Malingered Neurocognitive Dysfunction (MND) model has been highly influential for both feigning research and neuropsychological practice. In striving to be a comprehensive model of malingering, MND proposes complex criteria for ascertaining possible, probable, and definite levels. In its critical review, this article suggests the possibility of an MND bias towards the over-classification of malingering. It also examines the limits of MND research to adequately test the MND model. The conceptual and empirical limitations of MND are discussed with reference to theory and neuropsychological practice. 相似文献
988.
989.
990.
Terence J. Johnson 《Economy and Society》2013,42(2):164-193
Analyses of political development in colonial Africa have largely concentrated on the role of the educated elite in the emergence of nationalist movements. In recent years some attempt has been made to fill out this one-dimensional view through the study of early and more broadly based protest movements in various colonial territories. This paper takes as its subject matter the records of riots which occurred on the Gold Coast between 1890 and 1920. These disturbances are taken as an index of non-elite protest while an analysis of case-studies indicates their significance for political developments leading to the emergence of nationalist parties. 相似文献