# tobit two-stage in R

I'm working with a dependent variable $y_i \in [0,1]$. I have a single endogenous explanatory variable $w_i \in [0, 1]$ with corresponding instrument $z_i \in \{0,1\}$. Suppose further that I have a vector of exogenous explanatory control variables $\vec{x_i}$.

My intuition is to estimate a two-stage tobit model. Is this possible? Are there any caveats to doing this? Can I do this in R?

• Does the zero correspond to censoring or a corner solution? Dec 5, 2014 at 3:01
• Sorry, I should have added that the zero corresponds to a corner solution in both cases. Dec 5, 2014 at 3:20
• Correction: the [0,100] closed interval corresponds to two corner solutions. Dec 5, 2014 at 13:12
• You might find my answer to this question useful. stats.stackexchange.com/questions/66856/…
– Bill
Dec 5, 2014 at 17:29