In Simple Words
Think of a driver using a GPS navigation system; if the satellite signal is accurate, the driver follows the turns with confidence, but if the GPS is glitchy and places the car in the middle of an ocean, the driver ignores the navigation prompts entirely. Similarly, if teachers believe their principal cannot accurately evaluate classroom effort, they ignore the subjective raise system and do not increase their effort.
Teachers under the least accurate fifth of managers
- Flat 5% raise
- Comparison group
- Manager-rated raise
- No clear test-score gain
Restricted to the fifth of managers whom teachers rated least accurate. Manager accuracy was measured, not randomly assigned; uncertainty does not establish zero effect.
See source →Research question
Subjective performance incentives rely entirely on managerial observation quality; when employees perceive managers as inaccurate assessors of effort, subjective incentive power collapses.
Participants
N = 440,595 student-subject-level observations across 255 school clusters in Pakistan.
Study Design
Instrumental variable RCT interacting subjective contract treatment with teacher-reported manager rating inaccuracy (measured on a 5-step appraisal scale).
Results
For managers in the most inaccurate quintile (rating error > 2 steps out of 5), subjective performance pay had no statistically significant effect on student test scores (interaction coefficient = -0.211 SD, p < 0.05).
Takeaway
Assess evaluator accuracy using peer-appraisal cross-checks before deploying discretionary subjective incentive schemes, ensuring managerial evaluation error remains low.
Source and citation
See source →Read alongside the research
Plain-English glossary
Original explanations, informed by the references below. Examples are illustrations, not data from the studies above. The research text stays unchanged.
- Randomized controlled trial
A study that uses chance, like drawing lots, to decide who receives each option being compared. Researchers compare the groups’ outcomes to estimate the effect of those options.
ExampleA lottery assigns volunteers to a training programme or a comparison group. Researchers then compare their outcomes.
GET-IT glossary · Randomized study ↗Read more about randomized controlled trial →- Statistically significant
A label used when a result passes a chosen statistical threshold, often p < 0.05. It does not show how large or useful an effect is. A result that is not statistically significant does not prove there is no effect.
ExampleA study reports p = 0.03 against a 0.05 threshold. It passes that test, but the effect could still be too small to matter.
American Statistical Association · Statement on p-values ↗Read more about statistically significant →