In this paper, we use detailed job vacancy data to estimate changes in skill demand in the years since the Great Recession. The share of job vacancies requiring a bachelor's degree increased by more than 60 percent between 2007 and 2019, with faster growth in professional occupations and high-wage cities. Since the labor market was becoming tighter over this period, cyclical "upskilling" is unlikely to explain our findings.
Blair, Peter Q., and David J. Deming. "Structural Increases in Demand for Skill after the Great Recession." AEA Papers and Proceedings 110 (2020): 362-365.