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 )