William Shakespeare's collaborations in the context of "Shakespeare"

William Shakespeare (c. 23 April 1564 – 23 April 1616) was an English playwright, poet and actor. He is widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's national poet and the "Bard of Avon" or simply "the Bard". His extant works, including collaborations, consist of some 39 plays, 154 sonnets, three long narrative poems and a few other verses, some of uncertain authorship. His plays have been translated into every major living language and are performed more often than those of any other playwright. Shakespeare remains arguably the most influential writer in the English language, and his works continue to be studied and reinterpreted.

Shakespeare was born and raised in Stratford-upon-Avon, Warwickshire. At the age of 18, he married Anne Hathaway, with whom he had three children: Susanna, and twins Hamnet and Judith. Sometime between 1585 and 1592 he began a successful career in London as an actor, writer, and part-owner ("sharer") of a playing company called the Lord Chamberlain's Men, later known as the King's Men after the ascension of King James VI of Scotland to the English throne. At age 49 (around 1613) he appears to have retired to Stratford, where he died three years later. Few records of Shakespeare's private life survive; this has stimulated considerable speculation about such matters as his physical appearance, his sexuality, his religious beliefs and even certain fringe theories as to whether the works attributed to him were written by others.

Shakespeare attribution studies is the scholarly attempt to determine the authorial boundaries of the William Shakespeare canon, the extent of his possible collaborative works, and the identity of his collaborators. The studies, which began in the late 17th century, are based on the axiom that every writer has a unique, measurable style that can be discriminated from that of other writers using techniques of textual criticism originally developed for biblical and classical studies. The studies include the assessment of different types of evidence, generally classified as internal, external, and stylistic, of which all are further categorised as traditional and non-traditional.