Hi,
I am trying to model a score over time. This score shows a ceiling effect. I
was
willing to use a longitudinal tobit model, such as the one described by Twisk
et
al. (Twisk_Longitudinal tobit regression: A new approach to analyze outcome
variables with floor or ceiling effects_JCE_2009) but it is programmed for
STATA.
Has anyone used such models in R?
Any other idea?
David Biau.
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