Again, however, some portion of the rise in involuntary part-time work may reflect structural rather than cyclical factors. For example, the ongoing shift in employment away from goods production and toward services, a sector which historically has used a greater portion of part-time workers, may be boosting the share of part-time jobs.
Likewise, the continuing decline of middle-skill jobs, some of which could be replaced by part-time jobs, may raise the share of part-time jobs in overall employment.12 Despite these challenges in assessing where the share of those employed part time for economic reasons may settle in the long run, the sharp run-up in involuntary part-time employment during the recession and its slow decline thereafter suggest that cyclical factors are significant.