How to identify people who appear more than once in my data, but have different values recorded for race?

[Alex Paige]

Some people appear more than once in my data and, for some, at one point "race" is coded as white and at a different point, it's coded as Black for the same individual. I'd like to be able to identify each time an id has their race recorded differently over time so that I can try to resolve some of these discrepancies when possible. My data is in long format (I'd like to keep it this way, if possible). Thanks!

[Rich Goldstein]

the basic idea is to sort the data in the order you want (but certainly within person) and check for differences in race; since you did not provide an example of your data using -dataex- (please read the FAQ), exact code cannot be provided

[Nick Cox]

See https://www.stata.com/support/faqs/d...ions-in-group/ for an elaboration of Rich Goldstein's proposal.

[Alex Paige]

See https://www.stata.com/support/faqs/d...ions-in-group/ for an elaboration of Rich Goldstein's proposal.

Thank you so much! This is exactly what I needed.