Hello, If you have any advice on how to code a time-series HLM model in R? The code I have right now is: glmer(sale ~ agent_techmc*CultDistmc + ismc*CultDistmc + contactsmc*CultDistmc + pfmc + warranty + engineering_diff_res + Cust_internet + Cust_mobility_mobile + durationmc + (1| JOURNALTECHNAME)+ (1| Location), family = binomial(link="probit"), data=Essay2res) I am not sure how to specify that CultDist is time-varying whereas some of the other models are time-invariant. The DV is also time-varying. Any help would be greatly appreciated. Tahnk you, Nita Umashankar [[alternative HTML version deleted]]