What is the shared occupation of Donald Cammell and Leopold Wharton?
Donald Cammell Donald Seaton Cammell (17 January 1934 – 24 April 1996) was a Scottish film director who has a cult reputation thanks to his debut film "Performance", which he co-directed with Nicolas Roeg.
Donald Keim Donald B. Keim is an American economist, currently the John B. Neff Professor of Finance at Wharton School of the University of Pennsylvania.