Keynes's “Grandchildren” essay famously predicted both a rapid increase in productivity and a sharp shrinkage of the workweek – to fifteen hours – over the century from 1930. Keynes was right (so far) about output per capita, but wrong about the workweek. The key reason is that he failed...

Keynes's "Grandchildren" essay famously predicted both a rapid increase in productivity and a sharp shrinkage of the workweek - to fifteen hours - over the century from 1930. Keynes was right (so far) about output per capita, but wrong about the workweek. The key reason is that he failed to...