# NEWS.md

# smfa 1.0.0

## Initial CRAN release

* First public release of `smfa`.
* Implements stochastic metafrontier analysis for productivity and performance benchmarking across firms operating under different technologies.
* Supports three group-frontier types via 'sfaR':
  - Standard SFA (`sfacross`)
  - Latent class SFA (`sfalcmcross`)
  - Sample-selection-corrected SFA (`sfaselectioncross`)
* Three metafrontier estimation methods:
  - Linear programming (LP) deterministic envelope
  - Quadratic programming (QP) deterministic envelope
  - Second-stage stochastic frontier (Huang et al. 2014; O'Donnell et al. 2008)
* Full efficiency outputs via `efficiencies()`: group TE (JLMS and BC),
  metafrontier TE, and metatechnology ratios (MTR).
* Five vignettes illustrating each major use case.
