1-                 Dr. Ahmed Elsheikh Mohammed Ahmed, Associate Professor of Econometrics & Dean, Faculty of Economic & Social Studies, University of Khartoum, PO Box 321, Khartoum Sudan. Tel. (249-11) 775427.

2-                 Professor Khalid Sir Elkhatim, Council of Ministers, Consultancy group, Mobile: 0912392764.

3-                 Dr. Osman Ahmed Hassan Khieri, Associate Professor of Economic Planning, Development Studies and Research Center , Khartoum University, Mob: 0912302837 e-mail : Ossnan.khieri@yahoo.com