Mohammad Nijatullah Siddiqui is an Indian economist and is the winner of the King Faisal International Prize for Islamic Studies, He was born in India in 1931, educated at Aligarh Muslim University and also at Rampur and Azamgarh. Siddiqi served as Associate Professor of Economics and Professor of Islamic Studies at the Aligarh Muslim University and as Professor of Economics at the King Abdul Aziz University, Jeddah, in its Center for Research in Islamic Economics. Later, he was a Fellow at the Center for Near Eastern Studies at the University of California, Los Angeles and after that a Visiting Scholar at the Islamic Research & Training Institute, Islamic Development Bank, Jeddah. During his long academic career, he has supervised a number of Ph.D. theses in the universities in India, Saudi Arabia and Nigeria. For his contributions to Islamic Economics, he was awarded the Shah Waliullah Award in New Delhi (2003). A prolific writer in Urdu on subjects as Islami Adab (1960), Muslim Personal Law (1971), and Islamic Movement in Modern Times (1995), Siddiqi has also translated Abu Yusuf's Kitab al Kharaj (1966).