what is marginal and random effects which type of model is marginal which method is marginal and random marginal vs random effect model what is the difference between marginal and random-effect linear model what is marginal model vs random effects marginal and random effects models definition what is marginal model what are marginal and random effects how are marginal and random effects model different why marginal model is compared to random-effects? difference between marginal model and random effect which is more marginal or random effect model? difference between marginal and random effects what is marginal model versus random effect why is marginal model different than random effect model which model is the best marginal model variance marginal model vs random effect what is marginal model vs random effect