Bayesian Nonlinear Regression for the Air Pollution Effects on Daily Clinic Visits in Small Areas of Taiwan

We consider the complete clinic visit records and environmental monitoring data at 50 townships and city districts where ambient air monitoring stations of Taiwan Air Quality Monitoring Stations are located. A Bayesian analysis is carried out using regression spline model on principal components obtained from several pollutant covariables. The appropriate model is selected using Bayesian model averaging. A brief account of our results is provided for the elderly patients group.     

Modeling exotic highly pathogenic avian influenza virus entrance risk through air passenger violations

The highly pathogenic avian influenza virus (HPAIV) is able to survive in poultry products and could be carried into a country by air travelers. An assessment model was constructed to estimate the probability of the exotic viable HPAIV entering Taiwan from two neighboring areas through poultry products carried illegally by air passengers at Taiwan's main airports. The entrance risk was evaluated based on HPAIV-related factors (the prevalence and the incubation period of HPAIV; the manufacturing process of poultry products; and the distribution-storage-transportation factor event) and the passenger event. Distribution functions were adopted to simulate the probabilities of each HPAIV factor. The odds of passengers being intercepted with illegal poultry products were estimated by logistic regression. The Monte Carlo simulation established that the risk caused by HPAIV-related factors from area A was lower than area B, whereas the entrance risk by the passenger event from area A was similar to area B. Sensitivity analysis showed that the incubation period of HPAIV and the interception of passenger violations were major determinants. Although the result showed viable HPAIV was unlikely to enter Taiwan through meat illegally carried by air passengers, this low probability could be caused by incomplete animal disease data and modeling uncertainties. Considering the negative socioeconomic impacts of HPAIV outbreaks, strengthening airport quarantine measures is still necessary. This assessment provides a profile of HPAIV entrance risk through air travelers arriving from endemic areas and a feasible direction for quarantine and public health measures.     

Who mentors? Contextual prosocial motivation and willingness to be a mentor

This study provides insights for theory and practice into employee willingness to mentor. This is especially important in passing knowledge from one generation of employees to another at a time when ageing populations are seen in many parts of the world. The study examines the relationship of contextual prosocial motivation with willingness to be a mentor while simultaneously considering various individual level influences on contextual prosocial motivation. Hypotheses were evaluated through a structural equation model. Results showed a positive relationship between contextual prosocial motivation and willingness to be a mentor. Additionally, organization-based self-esteem was positively related to contextual prosocial motivation, while proximity to retirement was negatively related to contextual prosocial motivation. Implications of the findings for human resource development are discussed with suggestions offered to strengthen contextual prosocial motivation of employees.     

Housewife, “gold miss,” and equal: the evolution of educated women’s role in Asia and the U.S.

The fraction of U.S. college graduate women who ever marry has increased relative to less educated women since the mid-1970s. In contrast, college graduate women in developed Asian countries have had decreased rates of marriage, so much so that the term “Gold Misses” has been coined to describe them. This paper argues that the interaction of rapid economic growth in Asia combined with the intergenerational transmission of gender attitudes causes the “Gold Miss” phenomenon. I present a simple dynamic model then test its implications using U.S. and Asian data on marriage and time use.     

Family‐Supportive Organizational Culture and Fathers' Experiences of Work–family Conflict in Sweden

This study explores fathers' experiences with work–family conflict and their perceptions of how supportive the organizational culture at work is regarding fathers' work–family needs, and whether a family‐supportive organizational culture is associated with less work–family conflict. A total of 377 fathers working in private Swedish companies were surveyed. While a modest proportion of fathers experienced high levels of work‐to‐family conflict, less family‐to‐work conflict was reported. Further, fathers perceived little work–family support from top managers, supervisors, and co‐workers. Our results indicate that the cultures in the examined companies have norms that separate work and family from each other. Fathers seem likely to experience work–family conflict as long as the family‐supportive organizational culture, especially at the work group level, is not well‐developed. When fathers experience their work organizations as family‐supportive, they are likely to be better able to combine work and family and thus to help Swedes achieve a more gender‐equal society.     

Operator performance and subjective response in control of flexible manufacturing systems

Abstract

In this study, allocation of functions and system size (number of machines) were manipulated to test their effects on operator performance and subjective response in a flexible manufacturing system (FMS). An experiment was conducted using a cross-over design with three independent variables: number of machines, task allocation, and sequence of task presentation. Operator performance was measured by response time, and subjective response assessed using two questionnaires. Physiological measures were also taken (EKG and respiratory rate). The results revealed that the number of machines in the system did not affect performance or subjective or physiological response while the effect of allocation level was significant for both performance and subjective response.     

Logical independence of the axioms characterizing the degree measure in van den Brink et al. (2008)

Theory and Decision -     

The Effects of Structural Breaks in ARCH and GARCH Parameters on Persistence of GARCH Models

We show that persistence of conditional volatility in large samples could be exaggerated by the existence of structural breaks in the ARCH and GARCH parameters. Our results suggest that extreme persistence frequently observed in index volatility does not necessarily indicate the same level of persistence over the sample period.