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Guillermo Martínez-Flórez Barry C. Arnold Heleno Bolfarine Héctor W. Gómez 《Journal of statistical planning and inference》2013
The main object of this paper is to propose a multivariate extension to the alpha-power model which is an alternative to the multivariate skew-normal model (Arellano-Valle and Azzalini, 2008). It also extends the power-normal model discussed in Gupta and Gupta (2008) by making it more flexible. Inference is dealt with by using the likelihood approach and a pseudo-likelihood approach based on conditional distributions which, although slightly less efficient, is simpler to implement. An application to a real data set is used to demonstrate the usefulness of the extension. 相似文献
34.
Most recommerce providers have moved to a quality‐dependent process for the acquisition of used products. They acquire the products via websites at which product holders submit upfront quality statements and receive quality‐dependent acquisition prices for their used devices. Motivated by this development of reverse logistics practice, the aim of this study is to analyze the product assessment process of a recommerce provider in detail. To this end, we first propose a sequential bargaining model with complete information which captures the individual behavior of the recommerce provider and the product holder. We determine the optimal strategies of the product holder and the recommerce provider in this game. We find that the resulting strategies lead to an efficient allocation, although the recommerce provider can absorb most of the bargaining potential due to his last mover advantage. In a second step, we relax the assumption of complete information and include uncertainty about the product holder's valuation of the product. We show the trade‐off underlying the recommerce provider's optimal counteroffer decision and analyze the optimal strategy, using a logistic regression approach on a real‐life dataset of nearly 6,000 product submissions. The results reveal a significant improvement potential, compared to the currently applied strategy. 相似文献
35.
Kun B Balázs H Arnold P Paksi B Demetrovics Z 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2012,28(1):27-46
The history of gambling in post-socialist countries is noticeably different from that of other countries in Europe. The goal
of this study was therefore twofold: Firstly, to systematically review all European epidemiological studies related to excessive
gambling in the general adult population, and secondly, to provide an overview of the state of gambling in Hungary based on
the first ever nationwide representative survey, setting the results against the backdrop of the earlier European studies.
A systematic review was carried out of European gambling studies which focus on a representative adult general population.
Hungarian data was obtained from the National Survey on Addiction Problems in Hungary general adult population survey (N = 2,710). Pathological gambling was measured by the South Oaks Gambling Screen. Lifetime prevalence of excessive gambling
(problem and pathological gambling) in the general adult population of European countries varies between 1.1% (Italy and Spain)
and 6.5% (Estonia). In Hungary, the prevalence of problem gambling is 1.9%, with pathological gambling at 1.4%. The socio-demographic
characteristics of the results are similar to those of other European countries. Using epidemiological data from the general
adult populations of two post-socialist nations, it was possible to compare the results with data from 12 other European countries.
Based on the data available, the extremely rapid liberation of the gambling market in the post-socialist countries has led
to a similarly swift escalation in associated gambling problems. 相似文献
36.
Ante-dependence models can be used to model the covariance structure in problems involving repeated measures through time. They are conditional regression models which generalize Gabriel’s constant-order ante-dependence model. Likelihood-based procedures are presented, together with simple expressions for likelihood ratio test statistics in terms of sum of squares from appropriate analysis of covariance. The estimation of the orders is approached as a model selection problem, and penalized likelihood criteria are suggested. Extensions of all procedures discussed here to situations with a monotone pattern of missing data are presented. 相似文献
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Relational Aggression, Relational Victimization, and Language Development in Preschoolers 总被引:4,自引:0,他引:4
Cheryl Bonica David H. Arnold Paige H. Fisher Alexandra Zeljo Kseniya Yershova 《Social Development》2003,12(4):551-562
We investigated language development, relational aggression, and relational victimization in ethnically, socioeconomically diverse preschoolers. Relational aggression was positively related to language development. Girls were more relationally aggressive than boys, and higher‐socioeconomic status (SES) children were more relationally aggressive and victimized than lower‐SES children. Neither gender nor SES conclusively moderated the relation between language and relational aggression, though some findings suggest the possibility of stronger relations among boys and lower‐SES children. Teachers agreed on ratings of relational aggression and relational victimization to a moderate extent. 相似文献
39.
Arnold J. Sameroff 《Infancy》2005,7(3):219-242
The effectiveness of researchers in infancy is conditioned by their participation in 3 agendas. The academic agenda is devoted to the question of understanding infants, the social agenda is devoted to the question of how to improve the life of infants, and the political agenda is devoted to finding the resources for both understanding and improvement. Amplification is provided for each agenda with attention to the evolution of theoretical frameworks used by infancy researchers. 相似文献
40.
Arnold Wilts 《KZfSS K?lner Zeitschrift für Soziologie und Sozialpsychologie》2004,56(4):777-779