Quantitative modelling seems admirably suited to help managers in their strategic decision making on operations management issues, but in practice models are rarely used for this purpose. Investigates the reasons why, based on a detailed cross‐case analysis of six cases of...

It is well known that inference in vector autoregressive models depends crucially on the choice of lag-length. Various lag-length selection procedures have been suggested and evaluated in the literature. In these evaluations the possibility that the true model may have unequal lag-length has,...

This communication is a response to the insightful note by Fellows on previous papers by the author. Not only has Fellows supplemented Chau's major arguments, he has also expanded the scope of discussion and raised new issues. While the author agrees with most of the points made by Fellows,...

This report is the Users' Manual that accompanies PMEDS-D, the demographic component of a new Windows-based version of the MEDS (Models of the Economic-Demographic System) software. PMEDS-D is designed for projecting and/or simulating the population, labour force, and number of households for...

The paper explores the effects of immigration on the rates of growth of the population and labour force and on the age distribution and dependency relations within the population. Projections are presented and the consequences of different future rates of immigration are investigated. Dependency...

Although conceptually pleasing, normal-gamma frontier models lead to difficult estimation problems. It is shown here that unless the sample size reaches several thousands of observations the shape parameter of the gamma density is hard to estimate, and that this carries over to estimates of the...