search for: translog

Hi, I am trying to find out the scale efficiency and optimal scale of banks by stochastic frontier analysis given the panel data of bank. I am free to choose any model of stochastic frontier analysis. The only approach I know to work with R is to estimate a translog production function by sfa or other related function in frontier package, and then use the Ray 1998 formula to find the scale efficiency. However, as the textbook Coelli et al 2005 point out that the concavity may not be satisfied, one needs to impose the nonpositive definiteness condition so that...

...t "igrid2" of function "frontier" as "gridDouble" * renamed argument "iprint" of function "frontier" as "printIter" * removed arguments "qxNames" and "quadHalf" from function "frontier", because quadratic or translog frontiers can be estimated with function "frontierQuad" now * added "logLik" method for objects of class "frontier" * added function "frontierQuad" for estimating quadratic and translog frontiers * added function "frontierTranslogRay" for estima...

...t "igrid2" of function "frontier" as "gridDouble" * renamed argument "iprint" of function "frontier" as "printIter" * removed arguments "qxNames" and "quadHalf" from function "frontier", because quadratic or translog frontiers can be estimated with function "frontierQuad" now * added "logLik" method for objects of class "frontier" * added function "frontierQuad" for estimating quadratic and translog frontiers * added function "frontierTranslogRay" for estima...

Hi there everyone, I have the following model (this is naturally a simplified version just for showing my problem, in case you're wondering this is a translog cost function with the associated cost share equations): C ~ á + â1 log X + â2 log Y + ã1 log Z + ã2 log XX C1 ~ â1 + â2 log YY + ã1 log ZZ Then I have some restrictions on the coefficients, namely that the sum of â equal 1 and the some of ã equal zero So, I've added the following equations t...

...diture elasticities, checking for theoretical consistency - tools for production/firm analysis with the 'Symmetric Normalized Quadratic' (SNQ) profit function: e.g. econometric estimation, calculation of price elasticities and shadow prices, imposing convexity - tools for quadratic and translog functions, e.g. econometric estimation, calculation of Hessians and derivatives - functions to write input files for and read output files of Tim Coelli's (1996) program "Frontier 4.1" (http://www.uq.edu.au/economics/cepa/ software.htm). In this way R can use "Frontier 4.1&qu...

...and rather specific "group" within the "old" micEcon package, it makes sense (IMHO) to separate them into a separate package. c) micEcon (version 0.6-0) includes the remaining parts of the "old" micEcon package, e.g. for economic analysis with Cobb-Douglas functions, translog functions, quadratic functions, CES (constant elasticity of substitution) functions, SNQ (symmetric normalized quadratic = generalized McFadden) profit functions, or linearly homogeneous non-parametric functions. I have uploaded all three packages to CRAN. They should be available for download on...

...ing the CES Function in R: Package micEconCES" (written by Geraldine Henningsen and Arne Henningsen) [1] has been added. The "micEcon" package (version 0.6-2) includes the remaining parts of the "old" micEcon package, e.g. for economic analysis with Cobb-Douglas functions, translog functions, quadratic functions, or linearly homogeneous non-parametric functions. All these packages are available on CRAN [2,3,4] and R-Forge [5]. [1] http://cran.r-project.org/web/packages/micEconCES/vignettes/CES.pdf [2] http://cran.r-project.org/package=micEcon [3] http://cran.r-project.org/p...

...diture elasticities, checking for theoretical consistency - tools for production/firm analysis with the 'Symmetric Normalized Quadratic' (SNQ) profit function: e.g. econometric estimation, calculation of price elasticities and shadow prices, imposing convexity - tools for quadratic and translog functions, e.g. econometric estimation, calculation of Hessians and derivatives - functions to write input files for and read output files of Tim Coelli's (1996) program "Frontier 4.1" (http://www.uq.edu.au/economics/cepa/ software.htm). In this way R can use "Frontier 4.1&qu...

...and rather specific "group" within the "old" micEcon package, it makes sense (IMHO) to separate them into a separate package. c) micEcon (version 0.6-0) includes the remaining parts of the "old" micEcon package, e.g. for economic analysis with Cobb-Douglas functions, translog functions, quadratic functions, CES (constant elasticity of substitution) functions, SNQ (symmetric normalized quadratic = generalized McFadden) profit functions, or linearly homogeneous non-parametric functions. I have uploaded all three packages to CRAN. They should be available for download on...

...ing the CES Function in R: Package micEconCES" (written by Geraldine Henningsen and Arne Henningsen) [1] has been added. The "micEcon" package (version 0.6-2) includes the remaining parts of the "old" micEcon package, e.g. for economic analysis with Cobb-Douglas functions, translog functions, quadratic functions, or linearly homogeneous non-parametric functions. All these packages are available on CRAN [2,3,4] and R-Forge [5]. [1] http://cran.r-project.org/web/packages/micEconCES/vignettes/CES.pdf [2] http://cran.r-project.org/package=micEcon [3] http://cran.r-project.org/p...

Dear Community, does anybody have an idea on how to estimate a system of three seemingly unrelated regressions, two of which being TOBIT and one OLS? Background: I am currently estimating a translog cost function and two corresponding cost share equations using systemfit and the seemingly unrelated regression ("SUR") specification. However, I consider it more appropriate to estimate the cost function via OLS and the cost share equations via TOBIT due to some peculiarities of the data...

...t "igrid2" of function "frontier" as "gridDouble" * renamed argument "iprint" of function "frontier" as "printIter" * removed arguments "qxNames" and "quadHalf" from function "frontier", because quadratic or translog frontiers can be estimated with function "frontierQuad" now * added "logLik" method for objects of class "frontier" * added function "frontierQuad" for estimating quadratic and translog frontiers * added function "frontierTranslogRay" for estima...