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101.
102.
The Analysis of Verbal Behavior - 相似文献
103.
Toledo Douglas Umetsu Cristiane Akemi Camargo Antonio Fernando Monteiro de Lara Idemauro Antonio Rodrigues 《AStA Advances in Statistical Analysis》2022,106(3):473-497
AStA Advances in Statistical Analysis - Count data as response variables are commonly modeled using Poisson regression models, which require equidispersion, i.e., equal mean and variance. However,... 相似文献
104.
The estimation of variance-covariance matrices through optimization of an objective function, such as a log-likelihood function, is usually a difficult numerical problem. Since the estimates should be positive semi-definite matrices, we must use constrained optimization, or employ a parametrization that enforces this condition. We describe here five different parametrizations for variance-covariance matrices that ensure positive definiteness, thus leaving the estimation problem unconstrained. We compare the parametrizations based on their computational efficiency and statistical interpretability. The results described here are particularly useful in maximum likelihood and restricted maximum likelihood estimation in linear and non-linear mixed-effects models, but are also applicable to other areas of statistics. 相似文献
105.
Douglas V. Porpora 《Sociological Forum》1996,11(2):209-229
With the increased sociological interest in popular culture, many studies have examined the hero types lauded by the media
from situation comedies to movies, books, and magazines. Few studies, however, have examined who, if anybody, actual individuals
identify as personal heroes. To the extent that the hero identification of individuals has been examined at all, it has generally
been the hero identification of children and adolescents that has been studied. The study of heroes is important because heroes
are one indicator of who we are and what we stand for. That is partly what motivates the recent attention to the media's identification
of heroes. Yet while the media represent a very visible aspect of culture, who individuals privately cite as their heroes
is, although less visible, just as much a part of who we are as a culture. Accordingly, this paper reports on findings from
two telephone surveys conducted in Philadelphia that, among other questions pertaining to the meaning of life, asked adults
over 18 whether they had any heroes and if so who those heroes were. The tendency to identify with heroes was found to be
related to transcendental concerns with the meaning of life and to religiosity. Overall, the pattern of findings discloses
an unstudied dimension of cultural disenchantment. 相似文献
106.
Sociological Forum - 相似文献
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Using a new source of data, we estimate the probability of apprehension among Mexican migrants attempting to cross into the United States without documents. Over the period 1965-1989 we found an average apprehension probability of .35, confirming earlier estimates. We then applied annual probabilities to estimate the gross volume of undocumented Mexican migration and adjusted these figures to derive estimates of the net undocumented inflow. 相似文献
110.
Re-Assessing the Relationship between High School Sports Participation and Deviance: Evidence of Enduring, Bifurcated Effects 总被引:1,自引:0,他引:1
Despite its long-standing popular appeal, the idea that athletic activity is a deterrent to crime and delinquency suffers from a distinct lack of empirical support. This article tests the hypothesis that the relationship between high school sports participation and deviance varies by both type of deviant behavior and level of athletic involvement. The analysis is based upon longitudinal data focusing on the effects of involvement in high school sports, the country's largest institutional setting for youth sports participation, in early adulthood. We find that the relationship between athletic involvement and deviance varies significantly depending upon the deviant behaviors examined. Specifically, we find that shoplifting decreases with sports participation, while drunken driving increases. Moreover, these effects extend further into the life course (age 30) than has been demonstrated in any previous study and hold across all our measures of sports participation. Several potential explanatory mechanisms are evaluated. The implications of these enduring, bifurcated effects are discussed. 相似文献