How do changing expertise requirements shape occupational wages and employment?
Core argument: The authors' conceptual model shows that automation of a given task can simultaneously replace experts in some occupations and augment expertise in others, with countervailing effects on wages and employment.
Automation of any given task can simultaneously replace experts in some occupations and augment expertise in others. Our conceptual model shows how automation simultaneously replaces experts and augments expertise, and it predicts that changing expertise requirements have countervailing effects on wages and employment: automation that decreases expertise requirements reduces wages but permits the entry of less expert workers; automation that raises requirements raises wages but reduces the set of qualified workers. Analyzing data on employment and earnings by occupation over four decades, we show that changes in occupational expertise, stemming from both the removal and addition of occupational tasks, strongly predict changes in occupational wages. Our model makes the counterintuitive prediction that occupations with increasing expertise requirements see falling employment (alongside rising wages), while occupations with declining expertise requirements see rising employment alongside falling wages. The data robustly confirm this prediction.



