Xtset Stata Example. If for example one country does not have data for one year then the data is unbalanced. A duplicates command found 0 observations.
Below is an example of an autoregressive 1 covariance matrix. A duplicates command found 0 observations. Xtreg xtlogit xtpoisson etc.
A duplicates command found 0 observations.
I have checked and i have zero missing observations on country company and year. σ 2 σr σ 2 σr 2 σr σ 2 σr 3 σr 2 σr σ 2. Stcox age sex at a minimum stata needs to know the time at risk e g time from diagnosis to death or. For example after using stset a cox proportional hazards model with age and sex as covariates can be fltted using.
