[Limdep Nlogit List] Re: CREATING AN UNDEFINED VARIABLE?

[Gail Pacheco]

Hi
i am wanting to create a variable that is only defined for a subgroup of
the total sample, at the moment my coding is:
create; if (empl=1) min=mwcatsum;
if (empl=0) min=???$

i am not sure what to put in place of the question marks? When empl=1, i
want the variable min to equal mwcatsum. But when empl is 0, i want the
variable min to be undefined.
I am using these variables in a sample selection model.

Any help would be much appreciated

thanks


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Gail Pacheco
Senior Lecturer - Economics
Faculty of Business
AUT University
gail.pacheco at aut.ac.nz
64-9-9219999 ext 5708