what is nested randomly effects model what is lme4 nested random effects what is the nested random effect how does lme4 model cross random random effects model specification what is the nested random effect model what type of random effects what is the model of lme4 how are random effects nested in the data structure what is lme4 crossed random effect what is the name of the nested data structure in lme4? what is lme4 crossed random effects what is nested in lme4 lme4 random effects model specification which random effect model is using the city, person, and person as the model what is the randomness model? what model has nested data what is the random effect in lme what is randomly crossed data structure what does the word cityb represent on a random effect model