st: Transforming panel data

[Laurence Rambert <rambert@rz.uni-potsdam.de>]

Hello,

Can anyone help me to transform my data?
I have panel data with:
iis firm number as identification number
tis year
some variables like employment...

I would like first to transform my data in the following way:
iis Region
tis year
For this purpose I need to sum up employment in firms belonging to each 
region

I would like to transform at least  my data in the following way:
iis (Region and Industry)
tis year
For this purpose I need to sum up employment in firms belonging to each 
industry in each region

Thanks a  lot!

Laurence




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