Em entrevista na The New Yorker, PAUL SAMUELSON registra a sua opinião sobre os maiores economistas de todos os tempos:
Q: At this stage, how would you rank Keynes?
A: “I still think he was the greatest economist of the twentieth century and one of the three greatest of all time.”
Q: “Who are number one and number two?”
A: “Adam Smith and Leon Walras.”