Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper develops an analytical model to study the effect of an increase in the demand for elite schools on stratification by family income in a centralized school choice system. The model shows that the sign of this effect depends on two counteracting forces: the relationships between family income and ability, and family income and demand. This result implies that higher school stratification by ability does not mechanically translate into higher school stratification by family income.