What factor played a large role in the economic boom of the 1920s?

A significant factor in the economic boom of the 1920s was the widespread adoption of new technologies and mass production techniques, particularly in industries like automobiles and consumer goods. The growth of consumer credit also allowed more people to purchase these goods, leading to increased demand and production. Additionally, the Stock Market expansion and speculative investments created a sense of prosperity, fueling further economic growth. Together, these elements contributed to a period of rapid economic expansion known as the "Roaring Twenties."