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# st: RE: RE: Variable generation

 From "Mentzakis, Emmanouil" To Subject st: RE: RE: Variable generation Date Mon, 11 Feb 2008 19:38:19 -0000

```Dear Nick,

Thank you

Manos

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: 11 February 2008 17:45
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: Variable generation

bysort hid (var1) : gen var2 = var1[1]

For more detail, see

FAQ    Replacing missing values
How can I replace missing values with previous or following nonmissing
values?
http://www.stata.com/support/faqs/data/missing.html

Your problem is only a twist away from that discussed in the FAQ.

However, in general you need to check that each -hid- is characterised
by at most one non-missing value on -var1-. See also

FAQ Number of distinct observations
How do I compute the number of distinct observations?
http://www.stata.com/support/faqs/data/distinct.html

Nick
n.j.cox@durham.ac.uk

Mentzakis, Emmanouil

I have a variable that identifies the household (hid), a variable that
identifies the number that each individual has within the household
(pid) and finally a variable that has some values of interest (present
only for some individuals).

I would like to create a new variable (var2) that has the value of var1
for all the pid in the same hid (as in the example below).

hid	pid	var1	var2
1	1	10	10
1	2		10
2	1		6
2	2	6	6
2	3	6	6
2	4		6
3	4	8	8
3	5		8

One way to do it is:
by hid: egen var2=mean(var1)

However, I was wondering if there was any command that rather than
taking averages, could copy that value to everybody with the same hid.

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```

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