Acknowledgements

My primary debt is to Professor Ramu Ramanathan of the University of California, San Diego. A few years back he was kind enough to provide me with the source code for his program ESL ("Econometrics Software Library"), which I ported to Linux, and since then I have collaborated with him on updating and extending the program. For the gretl project I have made extensive changes to the original ESL code. New econometric functionality has been added, and the graphical interface is entirely new. Please note that Professor Ramanathan is not responsible for any bugs in gretl.

I am grateful to William Greene, author of Econometric Analysis, for permission to include in the gretl distribution some of the data sets analysed in his text, and to Jeffrey Wooldridge for helping me prepare a gretl version of the data sets from his Introductory Econometrics: A Modern Approach.

With regard to the internationalization of gretl, I wish to thank Ignacio Díaz-Emparanza and Michel Robitaille, who prepared the Spanish and French translations respectively.

I have benefitted greatly from the work of numerous developers of open-source software: for specifics please see Appendix B to this manual. My thanks are due to Richard Stallman of the Free Software Foundation, for his support of free software in general and for agreeing to "adopt" gretl as a GNU program in particular.