Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
In this paper we provide some evidence that repeat taking of competitive exams may reduce the impact of background disadvantages on educational outcomes. Using administrative data on the university entrance exam in Turkey we estimate cumulative learning between the first and the nth attempt while controlling for selection into retaking in terms of observed and unobserved characteristics. We find large learning gains measured in terms of improvements in the exam scores, especially among less advantaged students.