Dear friends,

I have my estimations and models for time-series cross-sectional data. I have 172 countries in my sample. After running regressions, Stata reports that "(Std. err. adjusted for 159 clusters in id)". Actually, I have a large number of missing data for different countries, therefore the number of countries decreases to 159. However, I don't want to count these excluded countries by reviewing my dataset. There should be a command like "tab country if missing= ......."

How can I learn which countries are included in the estimation automatically? I am preparing an appendix, and want to report these 159 countries by their name.

Best,