We have developed a measure of the value of the customer’s waiting time that is applicable to all queuing systems. Since the birth of the modern queuing theory over one hundred years ago, this measure is the first addition to the list of the measures of performance of general queues that...

The (relative) cost of the customer’s waiting time has long been used as a key parameter in queueing models, but it can be difficult to estimate. Recently, Singhal, Singhal, and Kumar (2019) introduce a new queue characteristic, the value of the customer’s waiting time, which measures how an...

We demonstrate that innovations in import and pivot goods usually cause the innovator’s trading partner to benefit and that few exceptions occur, and those mostly when the innovator has the larger economy or the higher per capita income. If the productivities of all goods in one country...

When consumers reallocate their spending on goods and expect their consumption to change proportionally, this expectation will not be fulfilled in a specialized equilibrium and the equilibria that follow it, with the result that one country’s income increases and the other country’s...

We generate a set of scenarios for project portfolios such that no single portfolio contains mutually exclusive projects while the set contains all such scenarios. We us the compatibility matrix, a method in the operations management literature, to generate project scenarios. We then go further,...

We develop an optimal control model to maximize the net value provided by a software system over its useful life. The model determines the initial number of features in the system, the level of dynamic enhancement effort, and the lifetime of the system. The various factors affecting these...

The accumulated evidence indicates that pure revenue models, such as free-access models and pure subscription fee based models, are not sufficient to support the survival of online information sellers. Hence, hybrid models based on a combination of subscription fees and advertising revenues are...

The accumulated evidence indicates that pure revenue models, such as free-access models (where the revenue is solely dependent on advertisements) or pure subscription fee based models (where the revenue is solely based on subscription fees, and advertisements are not shown to customers), are not...

Individual celebrities or “human brands” in fields ranging from sports to art to politics use social media platforms to connect and engage with their audience. We analyze the effects of the content generated by human brands (referred to as human brand generated content) on the popular social...