A 2009 observational study reported that private insurance status is associated with decreased mortality risk compared to no insurance. Employing the same statistical model but with more recent data, we observe a weaker and statistically insignificant relationship. However, Medicaid coverage is associated with increased mortality risk; the adjusted hazard ratio for Medicaid compared to no insur...

Database programming in object-oriented systems can be supported by combining data modelling and programming technologies such that a data model supports the management of collections of objects where those objects are as specified by the underlying object-oriented programming language. This approach is the basis of the object data management services (ODMS) of the Comandos system. The ODMS dat...

This paper describes the results of a 5-year research programme into evaluating and improving the quality of data models. The theoretical base for this work was a data model quality management framework proposed by Moody and Shanks (In: P. Loucopolous (Ed.), Proceedings of the 13th International Conference on the Entity Relationship Approach, Manchester, England, December 14–17, 1994). A combin...

Customer behavior modeling has been gaining increasing attention in the operations management community. In this paper we review current models of customer behavior in the revenue management and auction literatures and suggest several interesting research directions in this area.

The literature has shown that relationship management between and within different entities is crucial in manifold contexts. The prominent IS research strands of IT business alignment and outsourcing relationships tackle this topic from different perspectives. We argue that there are strong overlaps of these concepts and claim for a consolidation of both research strands. We match both research...

Within analytical customer relationship management (CRM), customer acquisition models suffer the most from a lack of data quality because the information of potential customers is mostly limited to socio-demographic and lifestyle variables obtained from external data vendors. Particularly in this situation, taking advantage of the spatial correlation between customers can improve the predictive...

the aim of this study is to survey the relationship between total quality management and customer satisfaction. in this field research, we have used the standard questionnaire of fuentes et at (2004). the city of sanandaj is the statistical study of manufacturing companies and the statistical society, 135 managers and employees of the centers were randomly selected. in order to examining the re...

Prepaid customers in mobile telecommunications are not bound by a contract and can therefore change operators (‘churn’) at their convenience and without notification. This makes the task of predicting churn both challenging and financially rewarding. This paper presents an explorative, real world study of prepaid churn modeling by varying on three dimensions: data, outcome definition and popula...

Numerous health websites are developing rapidly in China and the competition is fierce between these websites. In order to win the competition, the websites operators need to satisfy their customers to attain more market shares. But few attention has been paid to factors affecting customer satisfaction and loyalty on these websites. As a result, the paper aims to empirically explore the factors...

Loyalty systems provide an interesting possibility for vendors in customer relationship management. This holds for both real world and online vendors. Beside potential benefits of loyalty systems, customers may fear an invasion of privacy, and thus often refuse to participate in such programs. In this paper, we present two variants of a privacyfriendly loyalty system to be used by online vendor...