Freddie deBoer • 3960 implied HN points • 17 Feb 26
- Studies using cutoffs and regression-discontinuity designs show that attending selective exam schools does not meaningfully boost test scores, college enrollment, or later earnings once you account for students' pre-entry ability.
- The schools' strong reputations come mainly from selecting already high-ability students, so student traits and background drive outcomes more than the school itself, and claims about lasting harm to bright kids stuck in regular classes lack solid support.
- That null effect matters for policy: trying to scale elite-school practices often fails, widening access to those schools may not change long-term results, and standardized tests can sometimes help talented disadvantaged students stand out.