agency Alessandra Donati appropriation art market artist rights artwork authentication choreography Christian Viveros-Fauné Christine J Vincent copyright Corinne Hershkovitch Daniel McClean Dawn Ades Donn Zaretsky economy ethics France funding Gabriel Pérez-Barreiro Georgina Adam Gilane Tawadros Giuseppe Calabi Guy Brett Italy Joan Kee John C. Welchman Judith Bresler Karl Von Trott law legislation Lisa Rosendahl Loretta Würtenberger Marcel Duchamp Martha Buskirk Martha Graham money morals Nate Harrison Penelope Curtis performance property score sculpture Shane Burke USA visual art Zu Solz