This is from the
Federal Reserve Bank of San Francisco, the bold emphasis is mine. Huh, I wonder what those "long term structural factors" could be?
The incidence of involuntary part-time work surged during the Great Recession and has stayed unusually high during the recovery. This may reflect more labor market slack than is captured by the unemployment rate alone. ...
[T]he ratio of the rate of involuntary part-time work [people who work part time but would prefer to work full time] to the unemployment rate has been rising over time, especially since 2010 but also during the 2002–07 recovery. The ratio rose from about 0.55–0.60 during the late 1990s to about 0.75 in early 2015. This trend increase in the prevalence of involuntary part-time work relative to the unemployment rate suggests that long-term structural factors may be boosting employers’ reliance on part-time work. ...
Involuntary part-time work vs. unemployment
