R packages - Jul 2013 - Version 1.0 of the R package "frontier" released

Dear all

I am happy to announce that version 1.0 of the "frontier" package is
available on CRAN. The R package "frontier" provides tools for
analysing efficiency and productivity using the "stochastic frontier"
approach. This R package is based on Tim Coelli's DOS software
"FRONTIER 4.1" and has been available on CRAN for almost 5 years now.
After many improvements of the source code, a few additional features,
and a few changes of the user interface in the beginning, the code and
the user interface have been rather stable in the previous 2.5 years.
The "frontier" package has been used by many R users and many
applications have proven its reliability. Therefore, I have called the
latest version of this package "1.0." This version is almost identical
to the previous versions but it includes citation information and the
argument "farrell" of efficiencies.frontier() has been renamed as
"minusU" and the argument "farrell" of summary.frontier()
has been
renamed as "effMinusU", because the term "farrell" was
misleading in
some cases. The argument "farrell" can still be used for maintaining
backward-compatibility.

http://cran.r-project.org/package=frontier

https://r-forge.r-project.org/projects/frontier/

Best regards,
Arne

--
Arne Henningsen
http://www.arne-henningsen.name

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