Potential Experience Measurement Bias
Observational StudyClinical Trial
Labor market evaluations in developing countries often rely on potential experience proxies (age minus schooling years minus six) rather than actual work history, introducing severe measurement bias due to frequent schooling disruptions and prolonged unemployment spells.
Picture this
Estimating a worker's professional skill based on age minus years of schooling is like calculating a car's engine health solely by the year it was manufactured rather than checking its odometer; in developing economies with high unemployment, age heavily overestimates actual time spent gaining on-the-job skills.
What the evidence says
Nonexperimental wage returns relying on potential experience proxies require approximately 10 years of estimated potential experience in Malawi to match the wage gain produced by 5 days of actual measured work experience, demonstrating that potential experience drastically underestimates true per-day returns while overstating accumulated work history.
- Who was studied
- N = 227 urban Malawian male job seekers with secondary education in Lilongwe, Malawi.
- How
- Empirical comparative analysis contrasting instrumental variable estimates of actual work experience returns against standard nonexperimental Mincerian regressions using potential experience.
What to do
Collect direct, event-history measurements of actual days worked rather than using potential experience formulas when evaluating human capital returns in developing economies.
From the source
"Potential experience is considered a poor proxy in general, and the prevalence of interrupted or delayed schooling and periods of unemployment in the developing-country context renders this an even poorer proxy for actual experience in these areas"
Employment Exposure: Employment and Wage Effects in Urban Malawi