fitted {sfaR}

Extract fitted values of stochastic frontier models

Description

fitted returns the fitted frontier values from stochastic frontier models estimated with sfacross, sfalcmcross, or sfaselectioncross.

Usage

## S3 method for class 'sfacross'
fitted(object, ...)

## S3 method for class 'sfalcmcross'
fitted(object, ...)

## S3 method for class 'sfaselectioncross'
fitted(object, ...)

Arguments

object

A stochastic frontier model returned by sfacross, sfalcmcross, or sfaselectioncross.

...

Currently ignored.

Value

In the case of an object of class 'sfacross', or 'sfaselectioncross', a vector of fitted values is returned.

In the case of an object of class 'sfalcmcross', a data frame containing the fitted values for each class is returned where each variable ends with '_c#', '#' being the class number.

Note

The fitted values are ordered in the same way as the corresponding observations in the dataset used for the estimation.

See Also

sfacross, for the stochastic frontier analysis model fitting function using cross-sectional or pooled data.

sfalcmcross, for the latent class stochastic frontier analysis model fitting function using cross-sectional or pooled data.

sfaselectioncross for sample selection in stochastic frontier model fitting function using cross-sectional or pooled data.

Examples

## Not run: 
## Using data on eighty-two countries production (GDP)
# LCM Cobb Douglas (production function) half normal distribution
cb_2c_h <- sfalcmcross(formula = ly ~ lk + ll + yr, udist = 'hnormal', 
data = worldprod)
fit.cb_2c_h <- fitted(cb_2c_h)
head(fit.cb_2c_h)

## End(Not run)