Part-Time Labor Scarcity Rationalization
RCTReview
Modern labor markets show a heavy concentration of full-time workers and non-participants with relatively few part-time workers, a distribution pattern that standard labor supply models struggle to explain without assuming rigid employer schedule constraints.
Picture this
Imagine a steep staircase where the bottom steps are wide and easy to step on, but the middle steps vanish almost entirely; workers either stay at the ground level (non-work) or leap directly to the higher full-time platform because the middle range offers almost no stable resting spot at standard market wages.
What the evidence says
Because the marginal value of time curve transitions rapidly from highly elastic below 30 hours to highly inelastic above 30 hours, the wage range in which part-time employment is optimal is extremely narrow, naturally generating a sparse intermediate hours distribution.
- Who was studied
- N = 1,152 unemployed job seekers across 80 U.S. metropolitan areas.
- How
- Parametric quartic polynomial fitting of empirical marginal value of time choices across 5-hour work increments from 5 to 50 hours/week to analyze the underlying shape of the labor supply curve.
What to do
Model part-time employment participation using non-linear labor supply curves rather than assuming structural employer-side hour rigidity mandates.
From the source
"There are relatively few part-time workers because intermediate hours are on the elastic part of the labor supply curve, implying a limited wage range where a worker would find it optimal to work part-time."
Labor_Supply_and_the_Value_of_Non_Work_Time_Experimental_Estimates.pdf