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re: st: Combining dates in Stata


From   Christopher Baum <kit.baum@bc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   re: st: Combining dates in Stata
Date   Thu, 26 Jan 2012 15:33:51 -0500

<>
I have two time variables in my dataset - one for year and one for month.

Both of these variables are numeric with Year containing four-digit
year values and month is a two-digit values ranging from 1 to 12.

I would like to combine the Year and month variables into one a time
variable to allow me to work with the dataset as a panel. How do I
recode (or replace) the Year and Semester month to create one.

Specifically, I would like to have one variable that reads 1/2000 for
january 2000, or 2000m1... I do not really mind the format!


Easily solved with help datetime_functions:

g yearmo = ym(year, month)
format yearmo %tm                 (or whatever you prefer)
tsset unitid yearmo

Kit


Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
                             An Introduction to Stata Programming  |   http://www.stata-press.com/books/isp.html
  An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html


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