question: What has the recent work with stylometry revealead about some of William shakespeare's collaborations?
answer: parts of some of the plays ascribed to Shakespeare are actually by other writers
context: Title: Stylometry
  Passage: Stylometry is the application of the study of linguistic style, usually to written language, but it has successfully been applied to music and to fine-art paintings as well.
  Title: Tony Pinkney
  Passage: Tony Pinkney (born 1956) is Senior Lecturer in the Department of English, Lancaster University, England.  He played an active role in Oxford English Limited (OEL), a leftwing group pressing for progressive reforms in the Oxford University English Faculty between 1982 and 1992, and edited its journal, .  Fred Inglis has asserted in his biography of Raymond Williams that ‘Tony Pinkney was the moving spirit of OEL’.  Pinkney’s work on Raymond Williams challenged the notion of Williams as a doggedly realist writer and argued instead for his openness to certain currents in modernism and postmodernism.  Pinkney’s most recent work has focused on William Morris and utopianism and he now runs a well-known blog on this topic, 'William Morris Unbound'.  In August 2011 he launched the Kelmsgarth Press  with Makiko Minow, and he is now working on "News from Nowhere Two", a sequel to Morris's utopia.
  Title: William Shakespeare's collaborations
  Passage: Like most playwrights of his period, William Shakespeare did not always write alone.  A number of his surviving plays are collaborative, or were revised by others after their original composition, although the exact number is open to debate.  Some of the following attributions, such as "The Two Noble Kinsmen", have well-attested contemporary documentation; others, such as "Titus Andronicus", are dependent on linguistic analysis by modern scholars; recent work on computer analysis of textual style (word use, word and phrase patterns) has given reason to believe that parts of some of the plays ascribed to Shakespeare are actually by other writers.
citations: William Shakespeare's collaborations Stylometry