The usual interpretation of suppressor effects in a multiple regression equation assumes that the correlations among variables have been generated by a particular structural model. How such a regression equation is interpreted is shown to be dependent on the structural model deemed appropriate. (Author/JKS)

A demand for more and better education has driven educators to seek the help of systems analysis in the process of decision making. Basic to the entire systems notion is the concept of a model, a simplified but controllable version of the real world. The systems approach, once the problem is defined, is to specify the subfunctions and…

Data on the problem of the loss of professional manpower by developing countries to develop countries is reported and analyzed from a survey of over 1,300 foreign students in over 30 U. S. colleges and universities. The ideological and scholarly debate generated by the brain drain and approaches to the study of professional migration are reviewed,…

The procedures and techniques developed to evaluate a project to implement media in elementary schools are discussed. To describe the decision-making setting, two necessary conditions--understanding (high or low) and amount of change (large or small)--were paired against each other resulting in four possible evaluation settings. The situation in…