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Changes in ‘sfaR’ version to 1.0.0 (2023-06-13).
Sample selection stochastic frontier model is introduced with
function sfaselectioncross.
texreg package can be used for results
output.
Robust variance-covariance matrix can be obtained using
lmtest package.
Add reciprocal of efficiency.
Add Battese and Coelli (1988) efficiency in the case of
sfalcmcross.
sfacross previously returns the wrong sign of the
gradient. Now the correct sign is returned.lcmcross is now replaced by sfalcmcross.
Associated methods are modified accordingly to the new class
sfalcmcross.Package maintainer has changed from Yann Desjeux to K Hervé Dakpo.
Arne Henningsen is now co-author of the package. Welcome onboard!
Remove dependencies to packages dplyr,
emdbook, fBasics, gsl,
MASS, moments, numDeriv, and
primes.
In the case of the truncated skewed Laplace distribution,
starting value for lambda is changed from 0.03 to
1.
In the case of the uniform distribution, theta is
reparameterized from theta = exp(Wu) to
theta = sqrt(12) * exp(Wu/2).
Remove initStart option from lcmcross.
It is replaced with whichStart option.
Add Roxygen comments.
Changes in ‘sfaR’ version 0.1.1 (2022-05-05).
NEWS file.The fitted() function now works properly for objects
of class sfacross.
When extraPar = TRUE, the coef()
function now works properly on objects of class lcmcross
for models with a number of classes (argument lcmClasses)
equal to 4 or more.
None.
The efficiencies() documentation is enriched with an
lcmcross example.
Updated DESCRIPTION file.
Updated startup message.
Changes in ‘sfaR’ version 0.1.0 (released on CRAN 2021-05-04).
efficiencies() is applied to an
object of class lcmcross an additional value is returned.
This new value, ineff_c#, returns the conditional
inefficiency for observations classified under class# only. Therefore a
value is assigned to ineff_c# only if the observations is
classified under class# (i.e. Group_c = #).efficiencies() function applied to an object of
class lcmcross, the values for u_c,
teJLMS_c, Group_c, and
PosteriorProb_c are now returned correctly. In the previous
version (v 0.0.91) all observations were applied the same values when
the argument lcmClasses was set to 3 and more. This bug is
now fixed.None.
Updated DESCRIPTION file.
In the efficiencies() function applied to an object
of class lcmcross, the returned elements have been
reordered in order to better reflect the logic of the
lcmcross model.
Updated efficiencies() documentation to incorporate
the new ineff_c# elements returned by the function, as well
as the reordering of the returned values.
Updated startup message.
First public release (released on CRAN 2021-03-05).
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.