Changes in version 1.0.1.9000                      

                 Changes in version 1.0.1 (2024-10-29)                  

BUG FIXES

  - In tests sfacross returns different output

                 Changes in version 1.0.0 (2023-07-04)                  

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.

                 Changes in version 0.1.1 (2022-05-05)                  

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.

                 Changes in version 0.1.0 (2021-05-04)                  

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.

                 Changes in version 0.0.91 (2021-03-05)                 

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