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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: Re: re: counter variable |

Date |
Sat, 2 May 2009 17:23:25 +0200 |

<>

HTH Martin _______________________

To: <statalist@hsphsun2.harvard.edu> Sent: Saturday, May 02, 2009 4:49 PM Subject: st: re: counter variable

<> T suggested g newvar = 1 if new_prc==1 bys Id (schlyr): replace newvar = newvar[_n-1]+1 if newvar !=1This sounds to me like a generally bad idea. The first statement justchanges the new_prc zero values into missing values. The second statementrelies upon the fact that missing is a value not equal to 1. Although thelogic works, I think Eva's suggested approach is a better way to thinkabout a problem like this (although I deplore her reliance on -setvarabbrev on-, which is IMHO a Very Bad Idea).Kit Baum | Boston College Economics & DIW Berlin |http://ideas.repec.org/e/pba1.htmlAn Introduction to Stata Programming |http://www.stata-press.com/books/isp.htmlAn Introduction to Modern Econometrics Using Stata |http://www.stata-press.com/books/imeus.html* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**st: RE: Re: re: counter variable***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**st: re: counter variable***From:*Kit Baum <baum@bc.edu>

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