Gordon, Robert J. - National Bureau of Economic Research (NBER) - 2012
years of relatively rapid productivity growth between 1890 and 1972. Once the spin-off inventions from IR #2 (airplanes, air … conditioning, interstate highways) had run their course, productivity growth during 1972-96 was much slower than before. In … temperature. Even if innovation were to continue into the future at the rate of the two decades before 2007, the U.S. faces six …