"So despite all the cheerleading from the Bill Gateses and Mark Zuckerbergs about our recent innovations, Silicon Valley and even many economists have failed to

"So despite all the cheerleading from the Bill Gateses and Mark Zuckerbergs about our recent innovations, Silicon Valley and even many economists have failed to take into account something crucial: The economist’s basic measure of technical progress has been lagging. Overall, growth comes from improved productivity. ... And the data show the sad fact that TFP growth since 1970 has been barely one-third of the rate achieved from 1920 to 1970." This makes me wonder, in a head-to-head measurement (which would be difficult to do in any sort of correct fashion) would refrigeration beat computers in a head-to-head competition of what raised GDP output more? I'm guessing it would. How about the combine harvester? Morning dose of humility to our era and work.