alt Hacker NewsCarl Benedikt Frey at Oxford has documented that the Industrial Revolution took seventy years before wages and employment recovered for the workers it displaced.
I can’t imagine what claim this sentence is intending to describe.
Obviously individual workers can’t “recover” their wages: 70 years later they’re no longer working.
It also can’t make sense as a recovery of labor in displaced industries, since those are largely gone once they’re supplanted by labor-saving technology.
It means it took 70 years for the average income and employment rate of socio-economic class of people who used to work those jobs (presumably formulated as some percentile of society by income) to rise back to the the same level.