Franco Modigliani won the 1985 Nobel Memorial Prize in Economic Sciences for his pioneering analyses of saving and of financial markets.
Modigliani helped develop the life-cycle hypothesis, which explains saving as a pattern spread across a person’s lifetime. People may borrow when young, save during their working years, and draw down assets after retirement. This framework became influential in studies of household wealth, pensions, consumption, and demographic change.
He also made major contributions to corporate finance with the Modigliani–Miller theorem, developed with Merton Miller. In its basic idealized form, the theorem examines when a firm’s value is independent of its financing mix. The 1985 prize was awarded to Modigliani alone, while Miller shared the 1990 prize. That distinction is a frequent source of confusion when the two economists’ finance research is discussed together.