Nick Cox
> Another even more homespun way is illustrated by this
> example:
>
> . u auto
> . bysort foreign : egen freq = sum(1)
> . egen tag = tag(foreign)
> . list foreign freq if tag
You might wonder why I didn't
have that last example as
. u auto
. bysort foreign : gen freq = _N
. egen tag = tag(foreign)
. list foreign freq if tag
which would have made more use
of zeroth principles. One
answer would be that using -egen, sum()-
extends nicely to handling weights.
Nick
[email protected]
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