This is Debian GNU/Linux's prepackaged version of the GNU gretl program written by Allin Cottrell based on earlier code by Ramu Ramanathan. This package was put together by Dirk Eddelbuettel from the sources at http://gretl.sourceforge.net/ Gretl is Copyright (c) by Allin Cottrell and Ramu Ramanathan and released under the GNU General Public License. On Debian GNU/Linux systems, the complete text of the GNU General Public License can be found in the file /usr/share/common-licenses/GPL.