Part One Authorship and artists' rights -- Artists' rights in the United States: or, a remembrance of claims occasionally checked / Joan Kee -- Training ground for moral rights: MASS MoCA v. Christoph Büchel / Donn Zaretsky -- Retraction / Martha Buskirk -- Up for grabs; or, artistic authorship in the age of the flipper: Kreuk v. Vō / Christian Viveros-Fauné -- Authoring contradictions: modern appropriation art and postmodern copyright law in Cariou v. Prince / Nate Harrison -- Timeless/authorless / John C. Welchman -- The author stripped bare by its employees: artistic authorship in the twenty-first century and beyond / Lisa Rosendahl -- Part Two The artwork, aura, and authentication -- Demonstrable legacy; or, what sculptors leave behind / Penelope Curtis -- From the object to the archive: guaranteeing authorship and ownership in contemporary art / Alessandra Donati -- Score, performance, and the posthumous conductor / Shane Burke -- Hélio Oiticica: a principle of renewal / Guy Brett -- Artists' legacies, authentication, and the art market: not always a happy ménage / Georgina Adam -- Brave new art market: unsilencing the authenticators / Judith Bresler -- Artistic authorship, legacy, and expert liability in the French art market / Corinne Hershkovitch -- Authentication and the Italian art market / Giuseppe Calabi -- Part Three Legacy and its stewards -- Approaches to dealing with artists' estates / Loretta Würtenberger and Karl von Trott zu Solz -- What's an artist to do?--Artist-endowed foundations and legacy stewardship in the United States / Christine J. Vincent -- Artists' estates as guardians of artistic legacy: custodians or gatekeepers? / Daniel McClean -- Marchel Duchamp, Foundation, 1917: a controversial history / Dawn Ades -- Thing 000955 (Martha Graham's choreographies / Agency -- A brass-plated boxing ring: foundations, artists' estates, and legacy / Gabriel Pérez-Barreiro -- Appendix; or, some adjectival notes on authorship and legacy / Gilane Tawadros.