How does Miller reflect his own life in the play?

Although the play premiered in 1949, Miller began writing Death of a Salesman at the age of seventeen when he was working for his father's company. In short story form, it treated an aging salesman unable to sell anything. He is berated by company bosses and must borrow subway change from the young narrator. The end of the manuscript contains a postscript, noting that the salesman on which the story is based had thrown himself under a subway train.

Arthur Miller reworked the play in 1947 upon a meeting with his uncle, Manny Newman. Miller's uncle, a salesman, was a competitor at all times and even competed with his sons, Buddy and Abby. Miller described the Newman household as one in which one could not lose hope, and based the Loman household and structure on his uncle and cousins. There are numerous parallels between Abby and Buddy Newman and their fictional counterparts, Happy and Biff Loman: Buddy, like Biff, was a renowned high school athlete who ended up flunking out. Miller's relationship to his cousins parallels that of the Lomans to their neighbor, Bernard.