required the sampled required the sampled firms to have at least five observations in the data set

[hussein bataineh]

please i required the sampled required the sampled firms to have at least five observations in the data set WHAT The code i need to add to my regression

reg pensionassetallocationequitywh csopresence firmsizewh ROAwh operationcashflowvolatilitywh leveragewh dividendpayoutwh boardsizewh boardindependencewh contribu
tionwh pension_sizewh durationwh planreturnswh discountratewh mergersaquisitions i.sic i.year

[Ken Chui]

Create an indicator to count the number of cases from each unique firm. Assuming the variable for firm is called firm_id, generate this indicator by:

bysort firm_id: gen total_case = _N

Then, use that as an "if" condition in the regression:

reg y x1 x2 if total_case >= 5