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