[6] During her tenure at Mademoiselle, Blackwell oversaw increased circulation—from 178,000 in 1939 to 540,000 in 1953 to nearly a million in 1971[1]—a change in focus towards young career women and the introduction of a literary aspect to the magazine.
[6] Many well-known authors were published in Mademoiselle during her time as editor-in-chief, including Eudora Welty, Truman Capote, William Faulkner, and Joyce Carol Oates.
[6] During her editorship, the magazine started the practice of allowing college women to write and publish an issue each summer.
The summer guest editorship program included Sylvia Plath,[6][4][7] Joan Didion, Mona Simpson, Ann Beattie, Francine du Plessix Gray, Meg Wolitzer, Betsey Johnson, Ali MacGraw, and Diane Johnson.
[1] Papers relating to her life, including her personal and professional correspondence, along with her work at Mademoiselle, were bequeathed by her husband to the American Heritage Center, operated by the University of Wyoming.