Here's the hypothesis evolving among these and other academics. Technology and globalization are boosting demand for the most-educated workers, those prized for abstract or conceptual skills. Top hedge-fund managers aren't being replaced by computers; they're harnessing them, to their great profit.
By contrast, technology and globalization are eroding demand for workers who do routine tasks in factories and offices, many of whom are high-school or even college grads. The voice-mail system does away with switchboard operators; back-office software eliminates bookkeepers; robots replace assembly-line workers. Or the work is shipped overseas to a foreign factory or an office linked to the U.S. by fiber-optic cables.
But technology and globalization are not eroding demand for personal-service workers. Those tasks can't be done by computer or shipped offshore. The services have to be delivered here in the U.S. -- and in person -- either by natives or by immigrants.
Here's more from WSJ.