Multi-period layout planning for hospital wards

Layout planning for hospitals is a long-term decision. Nevertheless, medical and organizational factors change over time. For example, demand for different-sized bed rooms varies based on medical requirements and patient preferences. In this paper, we consider the planning of ward layouts over multiple periods using different approaches. The fixed ward layout models aim at minimizing either the number of demand violations or costs for installing fixed patient rooms. In contrast, the variable ward layout model allows for layout adaptations to satisfy demand. Thus, additional costs for the movement of walls have to be considered. The application of the different approaches as a decision support tool for hospital planners is explained. Hence, it can be derived in which settings the costs for adapting a layout do not exceed the benefits of such a change. Computational experiments demonstrate the applicability of the models for realistic instances.     

GENERALIZATION OF THE DYBVIG–INGERSOLL–ROSS THEOREM AND ASYMPTOTIC MINIMALITY

The long‐term limit of zero‐coupon rates with respect to the maturity does not always exist. In this case we use the limit superior and prove corresponding versions of the Dybvig–Ingersoll–Ross theorem, which says that long‐term spot and forward rates can never fall in an arbitrage‐free model. Extensions of popular interest rate models needing this generalization are presented. In addition, we discuss several definitions of arbitrage, prove asymptotic minimality of the limit superior of the spot rates, and illustrate our results by several continuous‐time short‐rate models.     

Visual art in advertising: The effects of utilitarian vs. hedonic product positioning and price information

Recent research has reported that visual artwork used in advertisements or on product packaging affects perceptions of luxury and contributes positively to attitudes toward products. Thus, the use of visual artwork has been recommended to promote products. We investigated the effect of artwork on purchase intentions and identified a co-occurring negative effect via perceptions of expensiveness. Our research indicates that the sign of the overall effect of artwork depends on two moderators. The positive effect via perceptions of luxury exists only for hedonic products but not for utilitarian ones. The negative effect via perceptions of expensiveness only appears when information about the product’s price is not provided to the consumer. Based on our findings, we recommend using art only for hedonic products for which the prices are known.     

Consequences of customer loyalty to the loyalty program and to the company

Gaining customer loyalty is an important goal of marketing, and loyalty programs are intended to help in reaching it. Research on loyalty programs suggests that customers differentiate between loyalty to a company and loyalty to a loyalty program, yet little is known about the consequences of these two types of loyalty. Therefore, our study intends to make two main contributions: (1) improving our understanding of the constructs ??program loyalty?? and ??company loyalty??, (2) investigating the relative impact of the two types of loyalty on preference, intention, and purchase behavior for the case of a multi-firm loyalty program. Results indicate that company loyalty influences a customer??s choice to visit a particular provider and to prefer it over competitors, but it is not a strong predictor of purchase behavior. Conversely, program loyalty is a far more important driver of purchase behavior. This implies that company loyalty primarily attracts customers to a particular provider and program loyalty ensures that once inside the store, more money is spent.     

Bringing the elephant into the room? Enacting conflict in collective prosocial organizing

Cross-sector partnerships have the capacity to bring together partners from very different backgrounds and circumstances toward collective prosocial efforts. We conducted a longitudinal inductive field study of eight cross-sector partnerships formed as new ventures addressing a variety of fundamental social challenges in the context of deep inequality in post-Apartheid South Africa. This allowed us to develop theory and a process model that explains how some partnerships are able to achieve collective prosocial efforts while others engage in only one-sided efforts or become inactive. The key differences hinge on processes of enacting or failing to enact conflicting material interests among relevant stakeholders. Our results have implications for the inclusion of material interests in theories of cross-sector partnering and for our understanding of entrepreneurship under conditions of inequality. The theory we develop provides a platform for future research on collective prosocial organizing in the contexts that need it most.