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Re: st: Defining observation specific truncation points with truncreg


From   Eric Sevigny <els21+@pitt.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Defining observation specific truncation points with truncreg
Date   Thu, 30 Sep 2004 18:07:24 -0400

Right, but what if I have ll(10) for 1997 and ll(20) for 1996 and want to model these different truncation points? Can I do that with truncreg?

--On Thursday, September 30, 2004 6:00 PM -0400 Stas Kolenikov <skolenik@gmail.com> wrote:r


-ll(a) ul(b)- means that in a given observation, the observed response
can be anywhere between a and b. If it is actually smaller than a or
greater than b, it is actually truncated. -truncreg, ll(0)- would be
equivalent to the "standard" Tobit procedure: it says that anything at
zero or below, it is actually truncated at zero.

--
Stas Kolenikov
http://stas.kolenikov.name
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