Although early human capital theory recognized the relevance of workers' experience, its focus was on education and formal training. Recent studies find that much of the performance of newly hired workers is driven by learning by doing or learning from peers or supervisors in the workplace....

Building on Lazear's skill weights approach, we study the effect of having more or less heterogeneity in the training curriculum on supply of and demand for apprenticeship training. Modernizations of training curricula provide us with a quasi‐experimental setting as these modernizations can be...