Associate Professor Graduate School of Management and Economics Office #: 412 Tel:   +98(21)  66022755-56 Fax :  +98(21)  66022759 Email:m.najmi@sharif.edu   Address: School of Management and Economics, Sharif University of Technology, Tehran, Iran Web:http://gsme.sharif.edu/~m.najmi Designed by: Mohammad Reza Mahmoudi