Trump: The Art of the Deal also contains an 11-step formula for business success, inspired by Norman Vincent Peale's "The Power of Positive Thinking". Trump was persuaded to produce the book by Condé Nast owner Si Newhouse after the May 1984 issue of Newhouse's magazine "GQ" – with Trump appearing on the cover – sold well. Schwartz was hired to work on the book, and began working with Trump in late 1985. He interviewed Trump and – with permission from him – listened in on his phone calls. According to Schwartz in July 2016, Trump wrote none of the book, choosing only to remove a few
Essays in Positive Economics due to an empirical turn in economics that took place at the end the century, although by 2012 it still commonly served "as a way of avoiding awkward questions concerning simplifications, idealizations, and abstraction in economics rather than responding to them." Essays in Positive Economics Milton Friedman's book Essays in Positive Economics (1953) is a collection of earlier articles by the author with as its lead an original essay "The Methodology of Positive Economics." This essay posits Friedman's famous, but controversial, principle (called the F-Twist by Samuelson) that assumptions need not be "realistic" to serve as scientific hypotheses; they merely