Dear all,
I have an interval regression model and for some cases the lower bound is zero. As I want to take the logarithm of the bounds I run into problems.
The same issue has come up previously in the list and below is the link of a detailed answer by Nick Cox.
http://www.stata.com/statalist/archive/2007-02/msg00046.html
As Nick points out an acceptable strategy is "...to replace the zeros by half the smallest non-zero measurement..."
I was wondering if anyone could provide any references of published papers that have employed such approach.
Best regards
Manos
The University of Aberdeen is a charity registered in Scotland, No SC013683.
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