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re: re: re:st: Creating variable based on time reference


From   Christopher Baum <kit.baum@bc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   re: re: re:st: Creating variable based on time reference
Date   Wed, 19 Oct 2011 22:42:02 -0400

<.>
To get the 'response time' categorical variable requested, the irecode() fu=
nction is handy:

bys group (datesubmitted): g delta =3D datesubmitted - datesubmitted[1]
g responsetime = 1 + irecode(delta, 1, 5)

. l

    +-------------------------------------------------+
    |   datesub   group   datesu~d   delta   respon~e |
    |-------------------------------------------------|
 1. | 10/1/2011       1      18901       0          1 |
 2. | 10/9/2011       1      18909       8          3 |
 3. |  8/1/2011       2      18840       0          1 |
 4. |  8/2/2011       2      18841       1          1 |
 5. |  8/5/2011       2      18844       4          2 |
    +-------------------------------------------------+

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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