robustSFA (version 0.2.0)

efficiency: Function for Estimating Technical Efficiencies for Class rsfa

Description

This function returns the individual efficiencies calculated from the MDPD or ML estimates. The efficiencies are calculated using the estimator of Battese and Coelli (1988).

Usage

efficiency(object, ...)

Value

A column vector of the estimated individual efficiencies.

Arguments

object

An object of class rsfa.

...

Unsed.

References

Battese, G.E. and Coelli, T. (1988). Prediction of firm-level technical efficiencies with a generalized frontier production function and panel data. Journal of Econometrics, 38, 387-399.

Examples

## Example using the 'riceProdPhil' dataset from the `frontier` package
library(frontier)
data(riceProdPhil)

my.model <- log(PROD) ~ log(AREA) + log(LABOR) + log(NPK) + log(OTHER)
fit.ml <- rsfa(my.model, data = riceProdPhil)
efficiency(fit.ml)
fit.mdpde<- rsfa(my.model, data = riceProdPhil, alpha = 0.1)
efficiency(fit.mdpde)