Malzberg, Barry N. "Another Goddamned Showboat"
Divergence: 1926 CE
What if: Ernest Hemingway became a hack science fiction writer.
Summary: In 1941, Hemingway is still struggling to get published when the latest issue of Amazing Stories arrives, featuring a story by some kid named Asimov.
Published: In What Might Have Been? Volume 2: Alternate Heroes (eds. Gregory Benford and Martin H. Greenberg), q.v.; and The Passage of the Light: The Recursive Science Fiction of Barry N. Malzberg, NESFA 1994 (0915368595).