Teleemergency doctors support ambulance cars at the emergency site by means of telemedicine. Currently, each district has its own teleemergency doctor office (decentralized solution). This paper analyses the advantages and disadvantages of a centralized solution where several teleemergency...

The notion of "relativistic finance" became ingrained in the public imagination and has been asserted in many mass-media reports. However, despite an observed drive of the most reputable Wall Street firms to establish their servers ever closer to the trading hubs, there is surprisingly little...

We consider an economy where most of the health care is publicly provided, and where there is waiting time for several types of treatments. Private health care without waiting time is an option for the patients in the public health queue. We show that although patients with low waiting costs...

The modeling and simulation of public transportation networks is an important approach to alleviating the negative effects of sub-optimal systems implemented due to the rapid expansion of urban areas. Current approaches focus on optimizing the underlying structure and fail to consider the...

We study queueing networks with a single source and a single sink. We assume that walkers traverse a network according to an unbiased random walk, and we analyze how network topology affects the total mean queue size $Q$, which we use to measure congestion. We examine network topologies that...

Access privileges matter in private equity markets. Funds of funds and other financial intermediaries can create value not only by selecting, but also by being able to access, better investment opportunities. We find that access-constrained funds outperform their peers, and that limited partners...