I have an unbalanced panel data about mutual funds.
The variables are listed below:
yrm: the date variable,
wficn: the mutual fund identifier
crsp_fundno: the mutual fund share class identifier, one fund can have multiple share classes, one wficn can correspond to several crsp_fundno at each month
mgr_name: the name of a mutual fund manager or names of mutual fund managers; a mutual fund can be managed by a single manager, or be team managed

Theoretically, the value of mgr_name should be the same for different share classes (identified by crsp_fundno) of the same fund (wficn).
I want to investigate whether my data conforms to this theory.
How can I accomplish this task in stata? Thanks.