gretl is a package of applications designed for econometric analysis and modeling. This is the most advanced solution of its kind, and is distributed under the GPL license (i.e., completely free). The program works with a variety of evaluators, methods and types of source models. It also integrates the "own" scripting language. The models can be output in LaTeX format.
You can import sample files (Greene, Ramanathan, Gretl) and data files in TXT, SPSS, SAS and CSV formats before you start working with the program. To create a new project, just select its structure and "manually" enter the information to be analyzed (variables, values). The entered information can be presented in the form of statistical tables and graphs. The Gnuplot module with its own graphical shell (GUI) is used for drawing charts.
Among the most important advantages of gretl we would like to mention the support of OLS, GMM and ML analysis methods. Underneath the designation data are methods of least squares, generalized moments and maximum likelihood, respectively. They can be used both separately and in a complex way. The list of supported time series models includes ARIMA, GARCH, VAR, ARMA and VECM. Also gretl supports models with limited dependent variables: tobit, logit, probit and others.
As a powerful "stand-alone" econometric analysis tool, gretl provides integration with other related software solutions: GNU Octave, Ox and GNU R. They can be used for subsequent data analysis.
- econometric modeling and analysis tools;
- built-in script editor;
- support for iterative assessment teams and the Monte Carlo method;
- model output in LaTeX format;
- support for OLS, GMM and ML methods;
- integration with GNU Octave, GNU R and Ox;
- distribution under the GPL license;
- Import data arrays in CSV, TXT, SPSS and SAS formats;
- compilation of statistical tables and graphs.