(, crossSectionName, timePeriodName =, yName, xNames =, qxNames =, zNames =, quadHalf =, modelType = ( ( zNames ), 1, 2 ), functionType = 1, logDepVar =, mu =, eta =, insFile = 'front41.ins', dtaFile = ( '.ins$', '.dta', insFile ), outFile = ( '.ins$', '.out', insFile ), startUpFile = 'front41.000', iprint = 5, indic = 1, tol = 0.00001, tol2 = 0.001, bignum = 1.0E+16, step1 = 0.00001, igrid2 = 1, gridno = 0.1, maxit = 100, ite = 1 ) Arguments data data frame that contains the data. CrossSectionName string: name of the cross section identifier. TimePeriodName string: name of the time period identifier or NULL in case of cross-section data. YName string: name of the endogenous variable. XNames a vector of strings containing the names of the X variables (exogenous variables of the production or cost function). QxNames a vector of strings containing the names of the variables to construct quadratic and interaction terms.

As a shortcut, this argument can be set to 'all' for using all variables specified in argument xNames to get a full quadratic or translog model. ZNames a vector of strings containing the names of the Z variables (variables explaining the efficiency level). QuadHalf logical.

Jan 10, 2009 - The computer program FRONTIER Version 4.1 was written by Tim Coelli who is professor at the Centre for Efficiency and Productivity Analysis (CEPA). This modified version is available for download from here (with permission. The function 'front41WriteInput' from the R package frontier (available also. Frontier app free download - Frontier App, Frontier Leasing Driver App, Frontier Harley-Davidson, and many more programs. Keep the software on your Windows computer up-to-date and running.

Multiply the quadratic terms by one half? ModelType model type: either 1 for an 'Error Components Frontier' or 2 for an 'Efficiency Effects Frontier'.

FunctionType function type: either 1 for 'production function' or 2 for 'cost function'. LogDepVar logical.

Is the dependent variable logged. Should a 'mu' (in case of an 'Error Components Frontier', i.e. ModelType = 1) or a delta0 (in case of an 'Efficiency Effects Frontier', i.e. ModelType = 2) be included in the estimation. Should an 'eta' be included in the estimation (only in case of an 'Error Components Frontier', i.e. ModelType = 1).

InsFile name of the instruction file. DtaFile name of the data file. OutFile name of the output file. StartUpFile name of the start-up file. If this argument is NULL, no start-up file is written. Iprint numeric.

Print info every iprint iterations; if this argument is 0, do not print. Indic numeric.

Use in unidimensional search procedure: indic = 2 says do not scale step length in unidimensional search; indic = 1 says scale (to length of last step) only if last step was smaller; indic = any other number says scale (to length of last step). Convergence tolerance (proportiona). Tol2 numeric.

Tolerance used in uni-dimensional search procedure. Bignum numeric. Used to set bounds on densities and distributions. Step1 numeric. Size of 1st step in search procedure. Igrid2 numeric.

1 = double accuracy, 0 = single accuracy. Gridno numeric.

Steps taken in single accuracy grid search on gamma. Maxit numeric. Maximum number of iterations permitted ite numeric. 1 = print all efficiency estimates; 0 = print only the mean efficiency. Details A modified version of Tim Coelli's FRONTIER 4.1 that can be used non-interactively is available on. It can be called from within R using the system command (see example).

This version is is available as (FORTRAN) source code and (executable) binaries for GNU/Linux and MS-Windows. Value front41WriteInput writes an instruction file, a data file, and a start-up file for Frontier 4.1 to disk and it invisibly returns a list of class front41WriteInput. This list contains mainly the arguments with which front41WriteInput was called. An exception is element data, which is not the argument data but the data matrix that was written into the data file.

Furthermore, in case of an Efficiency Effects Model, the element eta contains the number of Z variables. Additionally, the returned list contains following elements: nCrossSection number of cross section units. NTimePeriods number of time periods. NTotalObs total number of observations. NXtotal total number of X variables (including quadratic and interaction terms). NZvars number of Z variables.

Author(s) Arne Henningsen References Battese, G.E. 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. Coelli (1995), A model for technical inefficiency effects in a stochastic frontier production function for panel data.

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Empirical Economics, 20, 325-332. (1996) A Guide to FRONTIER Version 4.1: A Computer Program for Stochastic Frontier Production and Cost Function Estimation, CEPA Working Paper 96/08,, University of New England. See Also, Examples.