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Re: st: left-side censoring of the independent variable


From   Steve Samuels <sjsamuels@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: left-side censoring of the independent variable
Date   Tue, 24 Jan 2012 17:56:33 -0500

You can't solve it in "STATA" (see the last entry of the list FAQ for the reason why), but you can probably solve it in Stata . The phenomenon you describe is not left censoring, at least in the survival terminology that Stata uses, but left-truncation, and the pre-defined period is the truncation point.

See the Statalist thread beginning at: http://www.stata.com/statalist/archive/2011-04/msg01276.html
especially the Wooldridge reference given in http://www.stata.com/statalist/archive/2011-04/msg01324.html


For a solution in Stata, download -stregshared- from http://vandenberg.vwl.uni-mannheim.de/2999.0.html .   I haven't tried it so can't give any advice about it.



Steve
sjsamuels@gmail.com


On Jan 24, 2012, at 7:41 AM, massimiliano stacchini wrote:

Dear users,
I'm dealing with left-side censoring of the primary regressor in my empirical model (in more detail, the
duration of a phenomenon is my  independent variable and it may be observed onlysince a pre-defined period onwards).
How do you treat this problem with STATA ? 

Thanks 

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