less than those reported for schooling of children. However, our internal rate of return estimates are very sensitive to …

estimation of earnings frontiers: the censoring of the income data, by multiple imputation. Then, we estimate individual … potential income with stochastic earnings frontiers, and we measure overeducation as the ratio between actual income and … potential income. It is shown that the measurement of overeducation by this income ratio is a valuable addition to the …