tobin                package:survival                R Documentation

Tobin's Tobit data

Description:

     Economists fit a parametric censored data model called the
     'tobit'.  These data are from Tobin's original paper.

Usage:

     tobin

Format:

     A data frame with 20 observations on the following 3 variables.

     durable Durable goods purchase

     age Age in years

     quant Liquidity ratio (x 1000)

Source:

     J Tobin (1958), Estimation of relationships for limited dependent
     variables. _Econometrica_ *26*, 24-36.

Examples:

     tfit <- survreg(Surv(durable, durable>0, type='left') ~age + quant,
                     data=tobin, dist='gaussian')

     predict(tfit,type="response")

