We show how the position of a limit order in the queue influences the decision of whether to cancel the order or let it rest. Using ultra high-frequency data from the Nasdaq exchange, we perform empirical analysis on various limit order book events and propose novel ways for modelling some of...

One prevalent assumption in queueing theory is that the number of servers in a queueing model is deterministic. However, randomness in the number of available servers often arises in practice, e.g., in virtual call centers where agents are allowed to set their own schedules. In this paper, we...

We analyze a service firm that caters to price and delay sensitive customers who are differentiated on both their value for the service and the cost of waiting. There is a continuum of customer types in our setting and we model each customer's cost of waiting to be linear in the delay incurred...

Owned by nobody and controlled by an almost immutable protocol the Bitcoin payment system is a platform with two main constituencies: users and profit seeking miners who maintain the system's infrastructure. The paper seeks to understand the economics of the system: How does the system raise...

Aims: To review the current state of hospital bed planning, and to develop a simple tool to estimate short-term future bed requirements using historical bed occupancy data. Study Design: Analysis of daily bed occupancy between January 2008 and October 2015. Synthesis of trends into a method for...

Queuing is an inevitable situation experienced in everyday life. In any service system, a queue forms whenever current demand exceeds the current capacity to serve. In this paper, an analysis of the queuing situation at the ticket windows in the Nigerian Railway Corporation Lagos Terminus was...

Many financial markets operate as electronic limit order books under a price-time priority rule. In this setting, among all resting orders awaiting trade at a given price, earlier orders are prioritized for matching with contra-side liquidity takers. This creates a technological arms race among...

Order positions are key variables in algorithmic trading. This paper studies the limiting behavior of order positions and related queues in a limit order book. In addition to the fluid and diffusion limits for the processes, fluctuations of order positions and related queues around their fluid...

We model competition between two firms selling identical goods to customers who arrive in the market stochastically. Shoppers choose where to purchase based upon both price and the time cost associated with waiting for service. One seller provides two separate queues, each with its own server,...

We study the impact of wait time on consumers' purchasing behavior when product quality is unknown to some consumers (the 'uninformed consumers'), but known to others (the 'informed consumers'). In a capacitated environment, wait times act as a signal of quality for uninformed consumers because,...