1. Transformation of Economic and Social Systems, Stabilization and Development in the Middle East and North Africa, German Development Institute, Bonn, Germany
2. Faculty of Economics and Political Sciences, Cairo University and Economic Research Forum (ERF), Egypt
3. Faculty of Economics and Political Sciences, Cairo University, Giza, Egypt and ERF
4. Department of Statistics, Faculty of Economics and Political Sciences, Cairo University, Giza, Egypt and ERF