Although both economists and psychometricians typically treat them as interval scales, test scores are reported using ordinal scales. Using the Early Childhood Longitudinal Study and the Children of the National Longitudinal Survey, we examine the effect of order-preserving scale transformations...

We develop a model of college major selection in an environment where firms and students have incomplete information about the student's aptitude. Students must choose from a continuum of majors which differ in their human capital production function and can act as a signal to the market....