Claim: Horrible Bosses is based on a story by the film's producer.
Evidence: Horrible Bosses is a 2011 American black comedy film directed by Seth Gordon , written by Michael Markowitz , John Francis Daley and Jonathan Goldstein , based on a story by Markowitz.
Michael Markowitz -LRB- born August 15 , 1961 -RRB- is a writer , producer , and actor who began his comedy career in The Mee-Ow Show , an improv group at Northwestern University.