Intra-Week Task Familiarity and Learning Dynamics
RCTReview
Evaluating whether casual day-labor productivity increases over short multi-day employment spans due to task learning and familiarity rather than worker turnover or selection.
Picture this
Imagine a worker starting a new assembly task. On day one, they spend time understanding the sorting rules and move cautiously, making frequent mistakes. By day four, repeated practice turns the sequence into muscle memory, enabling them to sort faster and make far fewer errors.
What the evidence says
Daily output increases from 6.02 units on Day 1 to 8.12 units on Day 4 (+2.10 units sorted per day, p < 0.01), while error rates drop from 2.20 to 1.69 errors per unit (-0.51 errors, p < 0.01), robust to worker fixed effects.
- Who was studied
- N = 612 contracted casual workers across 1,461 worker-day observations over 4 consecutive days in 12 villages in rural Malawi.
- How
- Individual fixed-effects panel regressions measuring daily output quantity and sorting error rates across 4 consecutive contract days.
What to do
Structure short-term casual contracts across consecutive days to capture intra-week learning curves and boost daily output volume.
From the source
"The quantity of output is also increasing with the day of the week, an effect that is robust to the inclusion of individual fixed effects... The number of errors per unit is decreasing in the day of the week, consistent with individuals gaining experience with the task."
Productivity in piece-rate labor markets: Evidence from rural Malawi