Kristin MacDonald is a Senior Statistician at StataCorp LP. She has played an instrumental role in designing the Stata suite of commands for Structural Equation Modeling (SEM). Kristin is a principal author of Stata's [SEM] Structural Equation Modeling Reference Manual. She is also the author of, and primary instructor for, Stata's SEM training course. Kristin works frequently with Stata users implementing models using Stata's SEM.