coef.summary.frontier {frontier} | R Documentation |
Extract the coefficients, their standard errors, t-values, and P-values
from stochastic frontier models returned by the summary
method
for objects of class frontier
.
## S3 method for class 'summary.frontier': coef( object, which = "mle", ... )
object |
an object of class summary.frontier
(returned by the summary method for objects
of class frontier |
which |
character string. Which coefficients should be returned? ('ols' for coefficients estimated by OLS or 'mle' for coefficients estimated by Maximum Likelihood). |
... |
currently unused. |
The coef
method for objects of class summary.frontier
returns a matrix,
where the four columns contain the estimated
coefficients, their standard errors, t-values, and P-values.
Arne Henningsen
# example included in FRONTIER 4.1 data( front41Data ) front41Data$logOutput <- log( front41Data$output ) front41Data$logCapital <- log( front41Data$capital ) front41Data$logLabour <- log( front41Data$labour ) sfa <- frontier( front41Data, "firm", "time", "logOutput", c( "logCapital", "logLabour" ) ) coef( summary( sfa ), which = "ols" ) coef( summary( sfa ) )