- Aggregate data on schools strongly suggest the impact of Metco long-running desegregation program is largely a composition effect.
- Micro data show some evidence of an effect of Metco on the scores of minority 3rd graders in Reading and Language.
- School level (District) results: Found a negative relationship between fraction METCO (fraction of students on desegregation program) and test scores. Found no association between fraction METCO and score for Whites.
- School Level (Brookline) results : No effect of METCO students on full sample of non- METCO students.
- No negative effect of increasing the fraction minority on most students.
- Negative effects on non-METCO minority are modest and short lived (Reading and Language Arts for Black third graders).
- Finds no peer effects of METCO program on non-METCO students.
- No minority composition effect on Non-Black, Non- METCO students. Minimal negative effects on minority Non-METCO students.
- Any peer effects from Metco are modest and short-lived.