Pré-publication, Document de travail: We study the effects of admission into elite public high schools in Mexico City on students' expected earnings, arguing these effects provide an indication of the value-added those schools produce. Using data for the centralized and exam-based allocation of students into schools and an adapted regression discontinuity design strategy, we find that admission substantially increases learning achievement, and also the future earnings and returns students expect from a college education, but no effect on the earnings expected with high school education alone. This suggests that students believe that the benefits from their elite education are complements to a college education.