Tamer G. I. Mansour Department of Agriculture Economic, Agricultural and Biological Research Institution, National Research Centre, Giza, Egypt
Soliman A. Esleem Department of Economics and Rural Development - Faculty of Environmental Agricultural Sciences – Arish University, Egypt
Salah S. Abd El-Ghani Department of Economics, Faculty of Economics and Administrative sciences- Al Imam Mohammad Ibn Saud Islamic University, Saudi Arabia
Amira E.E. Eid Economic Research Department, Desert Research Center, Giza. Egypt