We live in a constantly changing world and one that will hopefully be full of surprising new developments that enhance economic welfare. References Brynjolfsson, Erik, and Andrew McAfee. The Second Machine Age: Work, Progress, and Prosperity in a Time of Brilliant Technologies. New York, NY: W.W. Norton & Company, 2014. Cowen, Tyler.
The Great Stagnation: How America Ate All the Low-Hanging Fruit of Modern History, Got Sick, and Will (Eventually) Feel Better. New York, NY: Dutton Adult, 2011. Gordon, Robert J. “Is U.S. Economic Growth Over? Faltering Innovation Confronts the Six Headwinds,” NBER Working Paper 18315, (August 2012). Gordon, Robert J.