Re: st: RE: adding a new variable to a dataset

[Jean Sepulveda <jean.sepulveda@gmail.com>]

Thanks a lot Joe and the other helpers.
It works.

regards,

jsu

On Wed, Mar 19, 2014 at 2:57 PM, Joe Canner <jcanner1@jhmi.edu> wrote:
> Jean,
>
> If you have the unemployment data in a separate data set (or can easily get it into one), what you want is a simple merge:
>
> use persondata, clear
> merge m:1 region year month using unemployment.dta
>
> Regards,
> Joe Canner
> Johns Hopkins University School of Medicine
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Jean Sepulveda
> Sent: Wednesday, March 19, 2014 1:53 PM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: adding a new variable to a dataset
>
> Dear Statalisters,
>
> I have the following problem.  Have a dataset with the unit of
> interest being a person (about 10 million observations). Each person
> has associated the variables, among many others, month, year and
> region. Thus for every month, year and region of the country there are
> thousands of observations of different people.
> I now want to add a new column with the variable unemployment_rate.
> This rate varies each month for each region, but does not vary among
> individuals during a particular month-year-region triplet.
>
> I have been adding the observations of the new variable in a manual
> way like this:
>
> gen unemploy=3.3 if month==1 & year==2010 & region==1
> replace unemploy=4.2 if month==2 & year==2010 & region==1
> replace unemploy=5.2 if month==3 & year==2010 & region==1
>
> and so on. There are 16 different regions, and 3 years of monthly data.
>
> Do you know of a faster way to do this?
>
> I would appreciate any help,
>
> Regards
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