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371.
Thomas J. Boardman 《统计学通讯:理论与方法》2013,42(15):1437-1451
A graphical procedure for studying the cell contributions to the chi-square statistic for R×C contingency tables is presented. Several examples are included to illustrate how one might use this graphical procedure on large tables. 相似文献
372.
On the correlation between fraud and default risk 总被引:1,自引:0,他引:1
Thomas Mählmann 《Zeitschrift für Betriebswirtschaft》2010,80(12):1325-1352
Identity fraud is one of the fastest growing white-collar crimes today and a serious concern in our information-based economy.
This paper studies one type of identity fraud: new account fraud, where an impostor opens lines of credit using a false identity,
made-up or stolen. Relying on a unique data set of consumer bank accounts, that contains information on both, fraud and default
losses, I analyze the correlation between fraud and default risk. I find that common socio-economic/demographic account holder
characteristics have opposite effects on estimated default and fraud probabilities. For example, women possess a lower fraud
probability, but a higher default probability, compared to men, and foreigners are more likely to engage in account fraud
but less likely to default than Germans. Also, the portfolio level analysis indicates that portfolio loss distributions are
quite sensitive to ex ante portfolio characteristics like the share of foreigners or blue-collar workers. These findings have
important implications for banks managing their consumer credit portfolios using limiting rules based on borrower characteristics,
and for the adequacy of banks’ capital levels. 相似文献
373.
374.
Assuming a statistical model in which the joint distribution of the unobservable errors is drawn from independent univariate Student t's that are identically and symmetrically distributed, the sampling performance of traditional robust estimators and a family of Stein-like estimators are compared and evaluated. These results suggest that under thick-tailed distributions, the relative sampling performances and risk characteristics for a range of nonconventional Stein estimators remains approximately the same as in the case of their normal counterparts. The empirical risk implications of misspecifying the error distribution are investigated. 相似文献
375.
376.
Recent research has demonstrated that preschool children can decode emotional meaning in expressive body movement; however, to date, no research has considered preschool children's ability to encode emotional meaning in this media. The current study investigated 4- (N = 23) and 5- (N = 24) year-old children's ability to encode the emotional meaning of an accompanying music segment by moving a teddy bear using previously modeled expressive movements to indicate one of four target emotions (happiness, sadness, anger, or fear). Adult judges visually categorized the silent videotaped expressive movement performances by children of both ages with greater than chance level accuracy. In addition, accuracy in categorizing the emotion being expressed varied as a function of age of child and emotion. A subsequent cue analysis revealed that children as young as 4 years old were systematically varying their expressive movements with respect to force, rotation, shifts in movement pattern, tempo, and upward movement in the process of emotional communication. The theoretical significance of such encoding ability is discussed with respect to children's nonverbal skills and the communication of emotion. 相似文献
377.
Economic growth depends on human resources and human needs. The demographic age structure shapes both of these factors. We
study five-year data from the OECD countries 1950–1990 in the framework of an age structure augmented neoclassical growth
model with gradual technical adjustment. The model performs well in both pooled and panel estimations. The growth patterns
of GDP per worker (labor productivity) in the OECD countries are to a large extent explained by age structure changes. The
50–64 age group has a positive influence, and the group above 65 contributes negatively, while younger age groups have ambiguous
effects. However, the mechanism behind these age effects is not yet resolved.
Received: 16 January 1997/Accepted: 2 July 1998 相似文献
378.
BAYES AND EMPIRICAL BAYES METHODS FOR DATA ANALYSIS 总被引:2,自引:0,他引:2
379.
380.
Thomas F. Reed 《Journal of Labor Research》1990,11(1):73-80
This study uses data on 229 organizers from eight unions to assess differences in characteristics of organizers employed by
manufacturing and service unions. The results suggest that a new breed of organizer is entering the labor movement through
service unions-organizers who are younger, more highly educated, more socially mobile, and have less experience in the union
movement than organizers from manufacturing unions.
This article is based on data collected for a dissertation written at the Graduate School of Business at Columbia University.
I gratefully acknowledge the support of committee members David Lewin, James Kuhn, Casey Ichniowski, and Seymour Spilerman
of Columbia and Charles A. O’Reilly III of the University of California at Berkeley. I thank John Delaney for his many helpful
insights and suggestions during the course of my research and Shannon Ratcliff and Rick Fuentes for comments on an earlier
draft of this paper. This research was financially supported by the Industrial Relations Research Center and the Management
Institute at Columbia University and the Department of Management at Texas A&M University. 相似文献