Yamey's interest in rational economic decision-making led him to study historical accounting records. Yamey rejected the claim by Werner Sombart that the double-entry bookkeeping system was a pre-condition, or at least an important stimulating factor, for the emergence of modern capitalism. Yamey combined his interest in Accounting History with his love of art (he was a trustee of the National Gallery, London from 1974 to 1981 and of the Tate Gallery, London from 1978 to 1981) in his book Art & Accounting, a richly-illustrated survey of paintings portraying commercial scenes and business-people. He died in November 2020 at the age of 101.[4]