Please let me know if this is not an appropriate place to post this kind of question.
I am interested in how the type of injury migh vary by indivdual characteristics. A few injury episode variables as well as indivdual charateristics (e.g. age, gender) were selected, and the data is supposed to be hierarchical because a person can report multiple injuries (and hence multiple episodes).
However, the dataset after I ran the Stata do-file generated by the symstem was empty (0 observation), as opposed to nearly 1 million in the original data file. Has anyone encountered a similar situation? Might this result from some errors in the command files?