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These methods return the coefficients and their covariance matrix from a model estimated by Frontier 4.1.
● Data Source:
CranContrib
● Keywords: methods
● Alias: coef.front41Output, coef.summary.front41Output, vcov.front41Output
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Write an instruction file, a data file, and a start-up file for Tim Coelli's program Frontier 4.1 that performs stochastic frontier analysis.
● Data Source:
CranContrib
● Keywords: models
● Alias: front41WriteInput
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efficiencies
(Package: frontier) :
Returning Efficiency Estimates
This method returns efficiency estimates from frontier models.
● Data Source:
CranContrib
● Keywords: methods
● Alias: efficiencies, efficiencies.default
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frontierQuad
(Package: frontier) :
Quadratic or Translog Frontiers
This is a convenient interface for estimating quadratic or translog stochastic frontier functions using frontier.
● Data Source:
CranContrib
● Keywords: models
● Alias: frontierQuad
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front41Est
(Package: frontier) :
Estimate a Stochastic Frontier Model by Frontier 4.1
Estimate a stochastic frontier model with a modified version of Tim Coelli's program Frontier 4.1 (NOTE: this program has to be installed separately!).
● Data Source:
CranContrib
● Keywords: models
● Alias: front41Est
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sfa
(Package: frontier) :
Stochastic Frontier Analysis
Maximum Likelihood Estimation of Stochastic Frontier Production and Cost Functions. Two specifications are available: the error components specification with time-varying efficiencies (Battese and Coelli 1992) and a model specification in which the firm effects are directly influenced by a number of variables (Battese and Coelli 1995). This R package uses the Fortran source code of Frontier 4.1 (Coelli 1996).
● Data Source:
CranContrib
● Keywords: models
● Alias: frontier, print.frontier, sfa
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elas.frontierQuad
(Package: frontier) :
Elasticities of a Quadratic/Translog Frontier
Calculate the elasticities of a quadratic or translog frontier function.
● Data Source:
CranContrib
● Keywords: models
● Alias: elas.frontierQuad
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lrtest.frontier
(Package: frontier) :
Likelihood Ratio test for Stochastic Frontier Models
Testing parameter restrictions in stochastic frontier models by a Likelihood Ratio test.
● Data Source:
CranContrib
● Keywords: models
● Alias: lrtest.frontier
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Extract the log-likelihood value(s) from stochastic frontier models returned by frontier.
● Data Source:
CranContrib
● Keywords: models
● Alias: logLik.frontier
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fitted.frontier
(Package: frontier) :
Returning Fitted (Frontier) Values
This method returns the fitted “frontier” values from stochastic frontier models estimated with the frontier package (e.g. function sfa).
● Data Source:
CranContrib
● Keywords: methods
● Alias: fitted.frontier
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providing 
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