NEWS.md

In sfaR: Stochastic Frontier Analysis Routines

sfaR 1.0.1

BUG FIXES

• In tests sfacross returns different output

sfaR 1.0.0

Changes in 'sfaR' version to 1.0.0 (2023-06-13).

NEW FEATURES

• 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.

BUG FIXES

• sfacross previously returns the wrong sign of the gradient. Now the correct sign is returned.

DEPRECATED & DEFUNCT

• lcmcross is now replaced by sfalcmcross. Associated methods are modified accordingly to the new class sfalcmcross.

OTHER USER-VISIBLE CHANGES

• 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.

sfaR 0.1.1

Changes in 'sfaR' version 0.1.1 (2022-05-05).

NEW FEATURES

• The package is enriched with a NEWS file.

BUG FIXES

• 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.

DEPRECATED & DEFUNCT

None.

OTHER USER-VISIBLE CHANGES

• The efficiencies() documentation is enriched with an lcmcross example.

• Updated DESCRIPTION file.

• Updated startup message.

sfaR 0.1.0

Changes in 'sfaR' version 0.1.0 (released on CRAN 2021-05-04).

NEW FEATURES

• When the function 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 = #).

BUG FIXES

• In 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.

DEPRECATED & DEFUNCT

None.

OTHER USER-VISIBLE CHANGES

• 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.

sfaR 0.0.91

First public release (released on CRAN 2021-03-05).

sfaR documentation built on Oct. 29, 2024, 9:07 a.m.