which model is based on repeated observations on the same unit? what is the random effect model of salespeople how to solve random time how to figure out the impact of gender how to solve for salespersons time point how to find repeating time values in stata how to solve for repeating observations on the same unit at the same time point how can you solve for repeated observation how to do xtset repeatable observation what is xtset repeating observation how to find repeatable time in stata which of the following model is time-invariant? what is xtset in stata what does xtset repeat mean xtset repeated time value when is time invariant in stata how to figure out xtset model xtset time vs random effects which statistic does repeated observation mean and when to use how to solve random effects of gender