readFront41out: Read output of Frontier 4.1

Description

Read the output file of Coelli's program Frontier 4.1 that performs stochastic frontier analysis.

Usage

readFront41out( file = "front41.out", translog = FALSE )

Arguments

file

character variable with the name of the file to read.

translog

logical. Is the estimated function a translog function? (not implemented yet).

Value

a list of class front41out containing following objects:
versionthe version of Frontier 4.1 that produced the output.
insFilename of the instruction file used by Frontier 4.1.
dtaFilename of the data file used by Frontier 4.1.
modelTypemodel type: either 1 for 'Error Components Frontier' or 2 for 'Tech. Eff. Effects Frontier'.
modelTypeNamemodel type: 'Error Components Frontier' or 'Tech. Eff. Effects Frontier'.
functionTypefunction type: either 1 for 'production function' or 2 for 'cost function'.
functionTypeNamefunction type: 'production function' or 'cost function'.
logDepVarlogical. Is the dependent variable logged.
olsResultsresults of the OLS estimation.
nXvarsnumber X variables (exogenous variables of the production or cost function.
olsLogllog likelihood value of the OLS estimation.
gridResultsresults of the grid search.
mleResultsresults of the maximum likelihood estimation.
mleLogllog likelihood value of the maximum likelihood estimation.
mleCovcoefficient covariance matrix of the maximum likelihood estimation.
efficiencytechnical efficiency estimates.

References

Battese, G.E. and T. Coelli (1992), Frontier production functions, technical efficiency and panel data: with application to paddy farmers in India. Journal of Productivity Analysis, 3, 153-169.

Battese, G.E. and T. Coelli (1995), A model for technical inefficiency effects in a stochastic frontier production function for panel data. Empirical Economics, 20, 325-332.

Coelli, T. (1996) A Guide to FRONTIER Version 4.1: A Computer Program for Stochastic Frontier Production and Cost Function Estimation, CEPA Working Paper 96/08, http://www.uq.edu.au/economics/cepa/frontier.htm, University of New England.

Examples

Run this code

# read the output file that is provided with Frontier 4.1
   outFile <- system.file( "front41/EG1.OUT", package = "micEcon" )
   sfa <- readFront41out( outFile )
   sfa$mleResults
   sfa$efficiency

   # perform an SFA and read the output
   data( Coelli )
   Coelli$logOutput  <- log( Coelli$output )
   Coelli$logCapital <- log( Coelli$capital )
   Coelli$logLabour  <- log( Coelli$labour )

   writeFront41in( Coelli, "firm", "time", "logOutput",
      c( "logCapital", "logLabour" ) )

   system( "wine front41.exe" )
   sfa <- readFront41out()
   sfa$mleResults
   sfa$efficiency