Dear Nick,
Thank you for taking the time to respond. I understand what you mean but
actually, what I meant was that if I run
"reg income ageofwife ageofhusband schoolingofwife schoolingofhusband "
it gives me 0 observation because of how the explanatory variables
were generated:
ageofwife=age if wife==1
ageofhusband=age if husband==1
then used together ends up in intersection and here comes my problem.
Nirina
On 3/7/08, Nick Cox <[email protected]> wrote:
> Unless I am looking at another typo, you have it the wrong way around.
>
> ... if husband == 1 & wife == 1
>
> checks whether a particular person is _both_ husband _and_ wife.
> From your definitions, or otherwise, it is clear that can't happen,
> so as you say no observations turn out to be selected.
>
> You want
>
> ... if husband == 1 | wife == 1
>
> Otherwise put, | gives you unions, & gives you intersections.
>
> Nick
> [email protected]
>
> Nirina F
>
> Dear Nick,
> Also, husband's age, wife's age etc... were created using if wife==1&
> husband==1, so even if I don't use the constraint "if wife==1&
> husband==1", I get 0 observation.
> I am stuck with my definition.
>
> On 3/7/08, Nirina F <[email protected]> wrote:
> > I am sorry Nick, I meant sex==0 is male and I had it correct in my do
> > file but somehow I had it 1 here.
> > So after I generate these and then run reg with if wife==1 &
> > husband==1, I get 0 observation because the union of the two is zero.
> >
> >
> > On 3/6/08, Nick Cox <[email protected]> wrote:
> > > It seems that you have data on individuals, some male, some female;
> > > some husbands, some wives, some other categories.
> > >
> > > Your definitions are
> > >
> > > gen wife = ms == 2 & sex == 1 & head == 2
> > >
> > > gen husband = ms == 2 & sex == 1 & head == 1
> > >
> > > I assume here heterosexual marriages. Hence a husband must
> > > be male. So sex == 1 is wrong to define husbands if, as you say,
> > > that designates females.
> > >
> > > Nick
> > > [email protected]
> > >
> > > Nirina F
> > >
> > > Dear Nick,
> > > I looked at what you put together on Stata faqs
> > > http://stata.com/support/faqs/data/members.html
> > > so could you may be help me in this.
> > > I have one dataset so I don't need to merge but to separate members
> of
> > > household out but then be able to run a
> > > reg income ageofwife ageofhusband schoolingofwife fe
> > > This is how I defined
> > >
> > > gen wife=0
> > > replace wife=1 if ms==2 & sex==1 & head==2
> > >
> > > [ms is marital status, taking value 2 if married
> > > sex is gender, taking value 1 if female
> > > head is the relationship to hh head, taking value 2 if wife]
> > >
> > > gen husband=0
> > > replace husband=1 if ms==2 & sex==1 & head==1
> > >
> > > I have one dataset so I don't need to merge but to separate members
> of
> > > household out but then be able to run an equation like:
> > >
> > > reg income ageofwife ageofhusband schoolingofwife schoolingofhusband
> > >
> > > I know something is wrong with my definition above because I get 0
> > > observation when I run the regression.
>
> *
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>
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