-egen, concat()- was mentioned in my previous post in this
thread.
I agree with Svend that there are advantages to "reversible"
identifiers, and that they are pretty much necessary for any
subsequent merging.
Nick
[email protected]
Svend Juul
> N�dia wrote (via Nick):
>
> How can I generate an identifier from three variables?
> In my data I have a column for the house, one for the family
> and one for the individual
>
> example:
> house family individual
> 1 1 1
> 1 1 2
> 1 1 3
> 2 1 1
> 2 1 2
> ...
>
> and I would like to know how can I create an identifier per
> individual such as:
>
> individual
> 010101
> 010102
> 010103
> 020101
> ...
>
> -------------------------------------------------------------
>
> Nick immediately advised against creating a composite identifier.
> In my experience, it can sometimes be quite useful. Here N�dia could:
>
> egen id = concat(house-individual), format(%02.0f)
>
> For this to work, there must be no missing values in the original
> identifiers. If there are, things get messy.
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