thank you Rodrigo for your prompt answer!
I've tried your way, and it is better: now the sum is precise in most of the
cases, but still for some observations I obtain the rounded numbers, how weird!
thank you again
Mariarosaria
Citazione Rodrigo Alfaro <[email protected]>:
> This sounds weird, try the following steps:
>
> sort id year
> by id year: egen double newvar=sum(oldvar)
>
> then list, sum or tab to see the values of newvar.
>
> Rodrigo.
>
> ----- Original Message -----
> From: <[email protected]>
> To: <[email protected]>
> Sent: Monday, November 28, 2005 9:53 AM
> Subject: st: generating a new variable with the egen command
>
>
> > Dear all,
> > I'm trying to generate a new variable given by the sum of an existing
> > variable
> > by year (as I have 2 six month observations for the same year) and
> > individual.
> > The command is the following:
> > egen newvar=sum (oldvar), by(id year)
> >
> > the problem is that the original values are, for instance: 42224464 and
> > 67090781, but the sum that STATA computes is 109000000, instead of
> > 109315245.
> > Why does it round like that?
> > The old variable is stored as "double", I have tried to change the
> storage
> > type, using recast, but STATA does not allow to do it, as many values
> > would be
> > changed...
> > Thank you very much for any suggestions
> > Kind regards
> >
> > Mariarosaria Agostino
> >
> > Dipartimento di Economia e Statistica
> > Universit� della Calabria
> > ponte P. Bucci, 87036 Arcavacata di Rende (CS)
> > Italia
> >
> >
> >
> >
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> >
>
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