Deat Stata user,
I found this gunique function, and using the same variable list I got different total observations and unique observations by adding or not add
Code:
miss
option.

Code:
gunique id name_first name_last
N = 19,632,203; 4,678,062 unbalanced groups of sizes 1 to 6,026
Code:
gunique id name_first name_last, miss
N = 19,632,557; 4,678,416 unbalanced groups of sizes 1 to 6,026
Does anyone knows why the N and number of unbalanced groups are different in these 2 cases? And what means size 1 to 6026?

Thanks a lot!