[R] Tobit Modelling

Patrick Sessford
Fri, 06 Aug 2010 00:42:24 -0000

Dear R-users,

I would like to model data where the response variable consists of many minus
ones and many different positive values that seem to follow an apparently
separate distribution (ie. -1, -1, 0.5, -1, 3, 3.5, 1.2, -1, -1, 0.4, etc); no
values of the response can be less than minus one or between minus and zero
(exclusive).

I am aware of tobit regression but unaware of exactly how to implement it in R.
If anyone is able to help me on this issue I'd be extremely grateful; for
example, if my (continuous) explanatory variables were x1 and x2, how should I
define the model?

Thank you for your time.

Pat