Dear all,

I am reading a description of panel data. According to the description, it says that gender and other time-invariant characteristics conflict when two individuals are matched between samples.

Here is a full description: "Some respondents in the National Survey of College Graduates (NSCG), Survey of Doctorate Recipients (SDR), and National Survey of Recent College Graduates (NSRCG) are surveyed multiple times, providing opportunities for longitudinal data analysis. The variable PERSONID identifies individuals across survey years. (It replaces the original variable, REFID, which contains non-numeric values in some samples.) Users should note that in a small number of cases, gender and other time-invariant characteristics conflict when two individuals are matched between samples."

Is there any way that we can identify those conflicts by STATA and drop them?

Thank you for your help.