This paper first introduces the forecasting problems faced by large retailers, from the strategic to the operational, from the store to the competing channels of distribution as sales are aggregated over products to brands to categories and to the company overall. Aggregated forecasting that...

StephanÕs review of this new book by Thomopoulos begins, ÒStay away from this book.Ó The reviewer goes on to explain both his reservations about its content and method as well as the features he likes. Copyright International Institute of Forecasters, 2015

Misforecasting demand will cost profits and threaten reputations, market share, and even the business itself. Roland Martin and Stephan Kolassa draw on their expertise with retail companies to examine the major challenges for demand forecasting and the choices the demand forecaster must make....

Simple forecast combinations such as medians and trimmed or winsorized means are known to improve the accuracy of point forecasts, and Akaike’s Information Criterion (AIC) has given rise to so-called Akaike weights, which have been used successfully to combine statistical models for inference...

Kolassa reviews these two recent publications. Copyright International Institute of Forecasters, 2012