[R] Tobit regression

[Francisco Cribari]

Does anyone have an R function for the estimation of Tobit regression 
models (for censored responses), as described, e.g., in Davidson, R. 
and MacKinnon, J.G., 1993, Section 15.7, Estimation and Inference in
Econometrics, Oxford University Press? 

Thanks. FC. 

--
Francisco Cribari-Neto               voice: +55-81-32718420
Departamento de Estatistica          fax:   +55-81-32747425
Universidade Federal de Pernambuco   e-mail: cribari at de.ufpe.br
Recife/PE, 50740-540, Brazil         web: www.de.ufpe.br/~cribari

     Asymptotics is the art of knowing where to be sloppy
     and where to be precise.