THE EVOLUTION AND DETERMINANTS OF FRONTIER TOTAL FACTOR PRODUCTIVITY GROWTH IN TUNISIA Sofiane GHALI* University of 7 November at Carthage, UAQUAP, ERF. Pierre MOHNEN** Maastricht University, UNU-MERIT and CIRANO * Corresponding author: Faculté des Sciences Economiques et de Gestion de Nabeul Université du 7 Novembre à Carthage Route de Mrezga, 8000, Nabeul, Tunisia Fax : 00216 72 232 318 E-mail : sofiane.ghali@gnet.tn **UNU-MERIT, University of Maastricht, P.O. Box 616 6200 MD Maastricht The Netherlands E-mail: p.mohnen@merit.unimaas.nl The authors wish to thank for their critical comments H. Fehri, M. Goaied , F. Kriaa, M. Lahouel, F. Lakhoua, and T. ten Raa.