ON PRODUCTION FUNCTIONS, TECHNICAL PROGRESS, AND TIME TRENDS Jesus Felipe 1 Georgia Institute of Technology Atlanta, GA 30332-0610 E-mail: jesus.felipe@inta.gatech.edu Carsten A. Holz Social Science Division Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong E-mail: socholz@usthk.ust.hk 17 May, 2005 We would like to thank Franklin M. Fisher, Colin Hargreaves, Lutz Kilian, JSL. McCombie, the participants of the session on Quantitative Applications at the Western Economic Association International 71st Annual Conference (San Francisco, June 28 - July 2, 1996), and the participants of the Economics Seminars at the Hong Kong University of Science and Technology, the University of Hong Kong, and Universidad Carlos III de Madrid for their comments and suggestions. The usual disclaimer applies. 1 Please address correspondence to Jesus Felipe. This is the Pre-Published Version