| summary.frontier {frontier} | R Documentation |
Create and print summary results of a stochastic frontier analysis
returned by frontier.
## S3 method for class 'frontier': summary( object, effic = FALSE, ... ) ## S3 method for class 'summary.frontier': print( x, effic = x$printEffic, ... )
object |
an object of class frontier
(returned by the function frontier). |
x |
an object of class summary.frontier
(returned by the function summary.frontier). |
effic |
logical. Print the individual efficiency estimates? |
... |
currently unused. |
summary.frontier returns a list of class summaryfrontier
that is identical to an object returned by frontier
with three exceptions:
olsParam |
matrix of OLS estimates, their standard errors, t values, and P values. |
mleParam |
matrix of ML estimates, their standard errors, t values, and P values. |
printEffic |
argument effic. |
Arne Henningsen
# example included in FRONTIER 4.1
data( front41Data )
front41Data$logOutput <- log( front41Data$output )
front41Data$logCapital <- log( front41Data$capital )
front41Data$logLabour <- log( front41Data$labour )
sfa <- frontier( front41Data, "firm", "time", "logOutput",
c( "logCapital", "logLabour" ) )
summary( sfa )
# rice producers in the Phillipines
data( riceProdPhil )
riceProdPhil$lPROD <- log( riceProdPhil$PROD )
riceProdPhil$lAREA <- log( riceProdPhil$AREA )
riceProdPhil$lLABOR <- log( riceProdPhil$LABOR )
riceProdPhil$lNPK <- log( riceProdPhil$NPK )
rice <- frontier( riceProdPhil,
crossSectionName = "FMERCODE", timePeriodName = "YEARDUM",
yName = "lPROD", xNames = c( "lAREA", "lLABOR", "lNPK" ) )
summary( rice )
rice2 <- frontier( riceProdPhil,
crossSectionName = "FMERCODE", timePeriodName = "YEARDUM",
yName = "lPROD", xNames = c( "lAREA", "lLABOR", "lNPK" ),
zNames = c( "EDYRS", "BANRAT" ) )
summary( rice2 )