**gretl** - the Gnu Regression, Econometrics and Time-series Library - Is a cross-platform software package for econometric analysis.

**This Project WORKS on MAC OS X - with some major installation steps first - and ALSO has Links to the ***Macintosh versions of The X-12 ARIMA-SEATS Seasonal Adjustment Program*. Gnu Regression, Econometrics and Time-series Library

Is a cross-platform software package for econometric analysis, written in the C programming language. It is free, open-source software. You may redistribute it and/or modify it under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation.

- Easy intuitive interface (now in French, Italian, Spanish, Polish, German, Basque, Catalan, Galician, Portuguese, Russian, Turkish, Czech, Traditional Chinese, Albanian, Bulgarian and Greek as well as English)
- A wide variety of estimators: least squares, maximum likelihood, GMM; single-equation and system methods
- Time series methods: ARIMA, GARCH, VARs and VECMs, unit-root and cointegration tests, Kalman filter, etc.
- Limited dependent variables: logit, probit, tobit, heckit, interval regression, models for count and duration data, etc.
- Output models as LaTeX files, in tabular or equation format
- Integrated powerful scripting language
- Command loop structure for Monte Carlo simulations and iterative estimation procedures
- GUI controller for fine-tuning Gnuplot graphs
- Links to GNU R, GNU Octave and Ox for further data analysis

Supported formats include: own XML data files; Comma Separated Values; Excel, Gnumeric and Open Document worksheets; Stata `.dta` files; SPSS `.sav` files; Eviews workfiles; JMulTi data files; own format binary databases (allowing mixed data frequencies and series lengths), RATS 4 databases and PC-Give databases. Includes a sample US macro database. See also the gretl data page.

**http://gretl.sourceforge.net/**

https://sourceforge.net/projects/gretl/files/latest/download