How was Franco Modigliani awarded the Noble Prize in Economics?

Name: Franco Modigliani.
Country: Italy, United States.
Date of Birth: June 18, 1918.
Died: September 25, 2003.
Education: Doctor of Philosophy (Ph.D.) from The New School in Sapienza University of Rome (Laurea).
Subjects Of Study: Financial market life-cycle theory stock value.
Popularly Known: Developing The Modigliani-Miller Theorem of corporate finance.
Noble Prize Year: Nobel Prize for Peace in 1985, for his pioneering analyses of saving and of financial markets.