Payroll and progressive income taxes play an enormous role in the American fiscal system. The purpose of this study is to present some econometric evidence on the effects of taxes on married women, a group of growing importance in the American labor force. A testable model of labor supply is developed which permits statistical estimation of a…

Early procedures for the analysis of multivariate panel data do not rest on well-specified statistical models. Recent approaches based on path analysis suffer from the defects of variable standardization and lack of attention to measurement error. The paper formulates a measurement model for quantitatively scaled multivariate panel data. The model…

A review of the elementary ideas that are fundamental to most higher education resource models and necessary for understanding model-supported cost analyses. Analytic constructs providing information for policy decisions include the elementary model, the fundamental cost model, and the instructional cost index. (JT)

Describes and illustrates the structure of different versions of Mobius bands called prismatic rings or twisted prisms. Different forms are mentioned, such as the one bent into circular shapes and the toroidal polyhedrons. (GA)

A model of Brownian motion is discussed which includes viscosity effects. The model lends itself to Monte Carlo simulation and thus is suitable for an elementary physics laboratory experiment. (BB)

The author outlines the development, structure, and teaching and assessment problems of one introductory discipline-independent mathematical modelling course. (MN)

A method is proposed for modeling developmental data, and particularly the developmental relationship between the age of a child and the presence or absence of aggressive behavior. A dichotomous logistic response model is used. (Author/JKS)

Presents a causal model showing how teacher prophecies may transmit the effects of students' social origins to their academic achievements. Results of estimating this modes indicate that teachers do not engage in social class discrimination and that teachers' expectations affect not so much what is learned in school as the certification of this…

Available from: the North-Holland Publishing Company, P.O. Box 211, Amsterdam, The Netherlands. (JG)

Strategy games are used to expose teachers and their students to the techniques and strategies involved in true problem solving. (JT)

Available from: C. Elton Hinshaw, Secretary, 1313 21st Avenue South, Nashville, Tennessee 37212. (JG)

This preliminary study of the veterinary job market was initiated to monitor activities of new graduates and to serve as one check on the validity of prior veterinary manpower studies. Hypothetical, mathematical models compared numbers of veterinarians to livestock population, human population, single family dwellings, economy, etc. (LBH)

A model of qualities of mathematical activity was developed within a framework of learning goals. A clinical application of the model is described, in which ninth-grade students were given assignment projects. A hierarchy of effective guidance was established, permitting diagnostic evaluation and progressive development of mathematical activity.…

Assuming vectors of item responses depend on ability through a fully specified item response model, this paper presents maximum likelihood equations for estimating the population parameters without estimating an ability parameter for each subject. Asymptotic standard errors, tests of fit, computing approximations, and details of four special cases…

How computers have affected diagnosis in mathematics is discussed. A distinction is made between errors and mistakes, followed by consideration of computers as a diagnostic tool. The development of algorithms to diagnose errors and of models of student performance is described. (MNS)