The purpose of this article is to introduce and review the capability and performance of the Stata item response theory (irt) package that is available from Stata V.14, 2015. Using a simulated data ...

Ouellet, Melissa, and Michael W. Toffel. "Empirical Guidance: Data Processing and Analysis with Applications in Stata, R, and Python." Harvard Business School Working ...

Longitudinal panel data examples are used to illustrate estimation methods for individual growth curve models. These examples constitute one of the basic multilevel analysis settings, and they are ...