\HeaderA{tobin}{Tobin's Tobit data}{tobin}
\keyword{datasets}{tobin}
\begin{Description}\relax
Economists fit a parametric censored data model called the
\sQuote{tobit}.  These data are from Tobin's original paper.
\end{Description}
\begin{Usage}
\begin{verbatim}tobin\end{verbatim}
\end{Usage}
\begin{Format}\relax
A data frame with 20 observations on the following 3 variables.
\describe{
\item[durable] Durable goods purchase
\item[age] Age in years
\item[quant] Liquidity ratio (x 1000)
}
\end{Format}
\begin{Source}\relax
J Tobin (1958),
Estimation of relationships for limited dependent variables.
\emph{Econometrica} \bold{26}, 24--36.
\end{Source}
\begin{Examples}
\begin{ExampleCode}
tfit <- survreg(Surv(durable, durable>0, type='left') ~age + quant,
                data=tobin, dist='gaussian')

predict(tfit,type="response")

\end{ExampleCode}
\end{Examples}

