What type of contract should e-tailers offer sellers when facing internal competition.

This paper investigates whether an e-tailer should act as a platform and offer customers the product of a seller who can reach customers only through the e-tailer, and if so, what type of contract to offer the seller: a proportional commission based on revenue or a fixed fee per unit sold. The e-tailer also chooses the product line design: offer only her own product, offer only the outside seller's product, or offer both her own product and the seller's product. Intuitively, when the e-tailer's product outperforms the seller's product in terms of value-to-cost ratio, the e-tailer should not offer the seller's product.

The impact of infection risk on customers' joining strategies.

The risk of infection from the COVID-19 virus dictates businesses, such as supermarkets and department stores, to impose limits on the maximal number of customers allowed inside a store at any given time. These social distancing constraints generate long queues of waiting customers outside such businesses. This work investigates the impact of infection risk on arriving customers' strategic decisions regarding joining such queues.

Reducing risk of infection - The COVID-19 queueing game.

The COVID-19 pandemic has forced numerous businesses such as department stores and supermarkets to limit the number of shoppers inside the store at any given time to minimize infection rates. We construct and analyze two models designed to optimize queue sizes and customer waiting times to ensure safety. In both models, customers arrive randomly at the store and, after receiving permission to enter, pass through two service phases: shopping and payment.

Part-time practice in healthcare: Impact on operational versus medical performance.

We explore how reliance on part-time medical staff affects operational and medical outcome performance in two general surgery departments Whereas prior research has indicated that operational performance is positively associated with medical performance, we find that heavier reliance on part-time practice may deteriorate operational performance but not necessarily medical-outcome performance. For so-called "complex" patients, reliance on part-time practice may even override the effect of patients' characteristics on medical-outcome performance. This result calls into question common perceptions in behavior marketing literature regarding part-time employees' working patterns and efficiency, and thereby provides a new perspective regarding current labor-market trends.