gretl: gretl - Gnu Regression, Econometrics and Time-series Library gretl: gretl: Gretl is a software package for econometric analysis, written in the C gretl: programming language. It comprises a shared library, a command-line gretl: client program, and a graphical client built using GTK+. The library gretl: and command-line client should compile and run on any platform that gretl: supports ANSI C; the command-line client uses the GNU readline library gretl: if available. gretl: gretl: gretl: