It is widely believed that regression models for binary responses are problematic if we want to compare estimated coefficients from models for different groups or with different explanatory variables. This concern has two forms. The first arises if the binary model is treated as an estimate of a model for an unobserved continuous response and the…

Discusses problems researchers face when they want to describe relationship between several predictors and criterion variable. Considers ways of addressing problem of contribution of each predictor depending on which other predictors are in regression equation. Focuses on parallel information for each variable, examining initial and final…

Psacharopoulos has found a declining rate-of-return to education pattern across levels of per capita income, using international data. A reexamination of Psacharopoulos's cross-country data refutes his declining rate-of-return hypothesis and points to diversity of cross-country experience as a possibly significant factor in interpreting the data.…

The results of Seaver's (1973) quasi-experimental study of the effects of teacher expectancies on student achievement based on older sibling performance are reinterpreted as a regression artifact. That this rival explanation has not been recognized in the literature is probably due to the effects of researcher expectancies. (Author/BS)

In order to examine the possible effects of violation of assumptions using parametric procedures, this study is an exploratory investigation into the use of parametric versus nonparametric procedures using a multiple case study design. The case study investigation guidelines outlined by Yin served as the methodology. The following univariate…

Asserts that traditional approaches to multivariate analysis, including standard linear regression techniques, ignore the special character of count data. Explicates three suitable alternatives to standard regression techniques, a simple Poisson regression, a modified Poisson regression, and a negative binomial model. (MJP)