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| Gretl was created by Allin Cottrell on the basis of the source code written by Professor Ramu Ramanathan of the University of California.
Gretl is available for all main operating systems (Linux, Mac and Windows) and it is downloadable freely with Gnu license (the links to download the different vesions are on the home page of Gretl website). Though it can't be considered as a general-purpose statistical software (its main functions are time series analysis, regression analysis and various econometric tests), it is very useful thanks also to its perfect integration with R. and with two other statistical packages used in seasonal adjustement: Tramo-Seatss and X-12-Arima. |
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| Included in this software there is a large database which can be used as examples and moreover additional data can be downloaded directly from the Gretl web site. There is also a manual in pdf format (downloadable separately) which describes all kinds of analysis you can carry out in Gretl.
Gretl has an user interface with a menu by which you can open files or select the various modules to perform analyses. Gretl files are in Xml format, but this sofware can also import files saved by spreadsheet. Gretl is an extensible software, thanks to its internal scripting language and to its open source distribution. |
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