has started companies in the transportation, real-estate, and book-publishing industries using the Platform-Economy model. Platform companies are those that have little or no inventory, such as bookstores without books, taxi companies without cars, or hotels without rooms. Examples of platform companies are Amazon.com, Uber, and Airbnb. See also BiosGroup Prediction Company References Living people 21st-century American physicists American computer businesspeople People from Santa Fe, New Mexico Dartmouth College alumni 1953 births Computational physicists