how to calculate the difference between a cross effect in stata? can you cross effects what level is the clinical data crosswise and crosswise how can i cross an id when a nested model is used in stata what level of random effect in stata what is the cross effects model in stata what models are used to estimate variance in stata what is the model for the cross effect model stata is the patients id nested in stata what is the model to nested and crossed why are cross effect models nested? how do you calculate variation in crossed effect model statistics how to cross model does clinician and patient id converge in stata what is the nested model for stata what is the difference between a crossed and nested model of a randomization? what is the nested model of mixed effects what is the difference between nested model and cross effect what level is the cross-effect model