Calculate the number of companies in the panel data

[Clarisse Nguedam]

Dear all,

I have a survey panel data for firms (small, medium and larges firms) on 24 months. I would like to calculate the number of firms per month for each types of firms.

Is there a Stata command to do it?

Thank you for your help.

Best regards

[Nick Cox]

bysort month type : gen wanted = _N

may help.

[Clarisse Nguedam]

Thank you Nick.

Best regards