Lagged dependent variables (LDVs) are often used as predictors in ordinary least squares (OLS) models in the social sciences. Although several estimators are commonly employed, little is known about their relative merits in the presence of classical measurement error and different longitudinal processes. We assess the performance of four commonly…

This paper reports on an experiment designed to investigate the effect of structural and linguistic variables on level of difficulty in solving arithmetic word problems. Identification of such variables is intended to assist curriculum writers in preparing exercises at a specified level of difficulty for students at various age levels. The study…

The development of the Student Selection Battery for the Beginning Teacher Evaluation Study is described. This battery, which measures reading and mathematics achievement in second and fifth grade students, will be used to select target students for the study of teaching effectiveness. Methodological considerations included: the limited amount of…