[R] mixed-effects models for left-censored data?
den.duurs at lycos.com
Wed Jun 11 22:42:16 CEST 2003
excuse me if this is not exclusively an R-related question.
I have data from a nested design, both temporally and spatially, and the reponse variable of interest is left-censored. That is, only values > "some treshold" are available, otherwise "LOW" is reported.
Are there ways of building a linear model with both fixed and random effects, when the response variable is censored? Can the tobit model be modified to do this? Does anyone have experience with this type of dataset?
Help is much appreciated,
Remko Duursma, Ph.D. student
Forest Biometrics Lab / Idaho Stable Isotope Lab
University of Idaho, Moscow, ID, U.S.A.
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