Notes, Comments and Preliminary results Jul 11 2015 Adel Ben Youssef and Leila Peltier- Ben Aoun   Information and Communication Technologies: Their Use and Short and Long Run Effects   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Oct 24 2014 Adel Ben youssef , Walid Hadhri and Hatem Mhenni   Adoption of Information and Communication Technologies and New Organizational Practices in the Tunisian Manufacturing Sector   Abstract  Contact Information  Citation  Full Text  -  Note   Jun 18 2014 Mohamed El Hedi Arouri , Adel Ben Youssef , Hatem M'Henni and Christophe Rault   Energy use and economic growth in Africa: a panel Granger-causality investigation   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   May 29 2012 Zhou Wei and Adel Ben Youssef   The productivity impact of international technology transfer in China: Empirical investigation on Chinese regions   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result