I'm not an academic economist, so what do I know, but I think the authors aare missing something else. I think the productivity was in some part driven by minimum wage laws. At lower wages, developing, installing and maintaining ordering kiosks and smart phone ordering apps makes less sense, because fast food cashiers are so cheap. When fast food cashiers become more expensive (and the technology costs come down) kio…
> Within McDonald’s restaurants, for example, the locations with the largest increase in short-stay customers saw the most productivity growth.