An empirical method called Predicted Error Sum of Squares (PRESS) is advanced and studied. This method is used to examine the cross-validated prediction accuracies of some popular algorithms for weighted predictor variables. The weighting methods that were considered were ordinary least squares, ridge regression, regression on principal…

Recent developments in econometrics that are relevant to the task of estimating costs in higher education are reviewed. The relative effectiveness of alternative statistical procedures for estimating costs are also tested. Statistical cost estimation involves three basic parts: a model, a data set, and an estimation procedure. Actual data are used…

A theoretical framework for incorporating item response theory into the measurement of attitude and other personality processes is presented. The person by item model is introduced by considering the conceptual usefulness of such a model in understanding item responding, outlining the form of the model, briefly discussing methods for examining the…