st: How do I generate dummy variable for a nuclear family?

[AP S <aps463@gmail.com>]

Hi all,

I'm trying to generate a dummy for a nuclear family only (parents and
children) and separate them from extended family.
I have standard variables such as household id (hhid), person id(ar00) and
relationship to household head (ar02).
Based on these variables I'm trying to generate nuclear family variable but
haven't succeed so far.
Here's the code for ar02:

1.Head of household
2.Husband/wife
3.Children
4.Children
5.Sons/daughters-in-law
6.Parents
7.Father/mother-in-law
8.Siblings
9.Brother/sister-in-law
10.Grandchild
11.Grandparents
12.Uncles/aunts
13.Nephews/nieces
14.Cousins
15.Servants
16.Relative
17.Non-relative
21.Ex spouse


Here's an example of the data:
hhid  ar00 ar02
100     1     1     extended family
100     2     2
100     3     3
100     4     5
100     5     10
100     6     10
100     7     10
100     8     10
100     9     10
200     1     1     nuclear family
200     2     2
200     3     3
200     4     3
200     5     3
200     6     3
200     7     3

so I'd like to have a binary variable that say hhid=200 is a nuclear
family=1.
Could anybody help me with this problem?

Thank you in advance.

APS
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