History of the transistor about 15 volts". Brattain and H. R. Moore made a demonstration to several of their colleagues and managers at Bell Labs on the afternoon of 23 December 1947, often given as the birth date of the transistor. The "PNP point-contact germanium transistor" operated as a speech amplifier with a power gain of 18 in that trial. In 1956 John Bardeen, Walter Houser Brattain, and William Bradford Shockley were honored with the Nobel Prize in Physics "for their researches on semiconductors and their discovery of the transistor effect". Twelve people are mentioned as directly involved in the invention of the transistor
Wharton School of the University of Pennsylvania Albert S. Bolles, a lawyer, served as Wharton's first professor, and the school's Industrial Research Unit was established in 1921. Wharton professor Simon Kuznets, who later won the Nobel Prize in Economics, created statistical data on national output, prices, investment, and capital stock, and also measured seasonability, cycles, and secular trends of these phenomena. His work laid out what became the standard procedure for measuring the gross national product and the gross domestic product, and he later led an international effort to establish the same statistical information for all national economies. Professor Lawrence Klein, who also won the Nobel Prize