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).