Data Envelopment Analysis using Stata Files

  DEAS v2.0 - SourceForge Release Notes
  =====================================

  Recommended first download:
  deas_v2_0_stata_package.zip

  DEAS v2.0 is a major update to the Stata Data Envelopment Analysis package.
  It is organized around one unified Stata command:

      dea ..., model(...)

  The command keeps the original DEA-style syntax:

      dea inputs = outputs, options

  and also supports an extended Stata-style syntax:

      dea outputs, inputs(inputs) options

  Both forms produce the same results.

  Files in this folder
  --------------------

  1. deas_v2_0_stata_package.zip

     Recommended for most users. Contains the Stata ado-files, help files,
     quick-start guide, software license notice, article reuse notice, one
     teaching dataset, and the main article example do-file.

  2. deas_v2_0_article_supplement.zip

     Contains author-prepared forthcoming/accepted-manuscript article materials,
     the online supplement, figures, LaTeX source, and article reuse notices.
     These article files are not covered by the software license.

  3. deas_v2_0_replication_examples.zip

     Contains article examples, OECD education applications, validation scripts,
     logs, datasets, and figure-generating do-files.

  4. deas_v2_0_full_archive.zip

     Contains the complete accepted-file archive plus SourceForge posting,
     release preparation, copyright/reuse, and smoke-test documents.

  Quick start
  -----------

  After downloading and unzipping deas_v2_0_stata_package.zip, open Stata in the
  unzipped folder and run:

      adopath ++ "`c(pwd)'"
      which dea
      help dea

  Then run:

      use dea_6dmu.dta, clear
      dea i_employee i_area = o_sales o_profits, rts(crs) gen(eff_crs)
      dea i_employee i_area = o_sales o_profits, rts(vrs) gen(eff_vrs) reference
      dea i_employee i_area = o_sales o_profits, model(sbm) rts(vrs) gen(eff_sbm)

  Main features
  -------------

  - Unified dea command with model() option for sixteen DEA model families.
  - Backward compatible inputs = outputs syntax.
  - Extended Stata-style syntax using inputs().
  - Fast Mata two-phase revised simplex engine.
  - Optional Stata 16+ LinearProgram() IPM engine.
  - engine(auto) fallback from simplex to IPM for numerical robustness.
  - Standardized r() results across models.
  - Extension commands for Malmquist, window, network, cross-efficiency,
    bootstrap, fuzzy DEA, and game-theoretic DEA diagnostics.
  - Example, validation, and replication do-files included.
  - Author-prepared forthcoming Stata Journal article materials and online
    supplement included.

  Copyright and reuse
  -------------------

  The Stata software files are distributed under AFL-3.0; see LICENSE_CODE.txt
  inside the archives.

  Article manuscript files, if included, are not covered by the software license.
  They are author-prepared forthcoming/accepted-manuscript materials and are
  covered by ARTICLE_REUSE_NOTICE.md and ARTICLE_FILE_STATUS.md.

  The final published Stata Journal PDF should not be redistributed through
  SourceForge or GitHub unless publisher permission or policy explicitly allows it.

  Suggested citation
  ------------------

  Lee, C. Forthcoming. dea: An update and extension to Data Envelopment Analysis.
  Stata Journal.