Economics Insights @ CBS

We show how a simple normal approximation to Erlang's delay formula can be used to analyze capacity and staffing problems in service systems that can be modeled as M/M/s queues.

The increased complexity of modern manufacturing has led to uncertainties in production processes. Factors such as unplanned machine maintenance, tool unavailability, and complex process adjustments make it difficult to maintain a predictable level of output. To be effective, an appropriate production model must incorporate these uncertainties into the representation of the production process. This paper considers a one-time production of an application-specific product which must follow a fixed routing through the manufacturing system.

It has been suggested that evaluations may be based on a "How-do-I-feel-about-it?" heuristic, which involves holding a representation of the target in mind and inspect feelings that this representation may elicit. Previous studies have shown that reliance on such feelings depends on whether they are believed to be representative of the target. This paper argues that it also depends on whether feelings toward the target are regarded as relevant.

This study investigates factors influencing causal attributions in managerial decision making. Three categories of factors are identified: (i) prior beliefs (ii) background frequencies, and (iii) covariation cues. The impact of factors in each of the above categories on causal attribution are studied in a marketing decision making context. Subjects demonstrated a bias toward assigning causality to variables that occurred infrequently or were controllable. Also, subjects were particularly influenced by the joint-occurrences of cause and effect variables.