Financial data are expensive and highly sensitive with limited access. We aim to generate abundant datasets given the original prices while preserving the original statistical features. We introduce the Wasserstein Generative Adversarial Network with Gradient Penalty (WGAN-GP) into the field of...

We study customer service chat (CSC) systems with generally distributed service and patience times by developing measure-valued processes to model and analyze the system dynamics. We first prove that these processes are tight in the many-server asymptotic regime and then show that their limits...

Perishable inventory problems have a long history and involve two fundamental decisions, how much to order and how much old inventory to clear before expiration, that are known to be difficult to optimize due to the curse of dimensionality. Most early work ignores the clearance decision and...

Ride-hailing platforms such as Uber, Lyft, and DiDi coordinate supply and demand by matching passengers and drivers. The platform has to promptly dispatch drivers when receiving requests, since otherwise passengers may lose patience and abandon the service by switching to alternative...

With a dominant volume of global transportation being conducted by sea, ocean container transport is having a great impact on the global economy by playing an essential role in global supply chains. During the recession in 2009, many ocean container carriers have accelerated the practice of slow...

We study online demand fulfillment in sparse networks with arbitrary numbers of resources and request types, and positive Generalized Capacity Gaps (GCG) introduced by Shi et al.(2016). We show that such a sparse network with limited flexibility is both necessary and sufficient to achieve...

A blockchain system, such as Bitcoin or Ethereum, validates electronic transactions and stores them in a chain of blocks without a central authority. Miners with computing power compete for the right to create blocks according to a pre-set protocol and in return earn fees paid by users who...

In addition to traditional call centers, many companies have started building a new kind of customer contact centers, in which agents communicate with customers via instant messaging (IM) over the Internet rather than phone calls. A distinctive feature of the service centers based on IM is that...

This paper gives a brief review on types of subsidies and how they work in theory. The paper identified three types of subsidies: subsidies that increase revenue, subsidies that lower the cost of production, and subsidies that are not linked to production or input. With the use of graphic...

As the urbanization rate in the world has increased rapidly, the housing vacancy problem has become serious and attracting more attention. Calculating and analyzing vacant housing will help reduce the wasteful use of resources. This paper measures the housing vacancy rate and housing vacancy...