Custodes Futurifor the advancement of humanity

Educational factor, barrier 6 of 6

Rigid gatekeeping

Systems that require strength in every subject can screen out people with exceptional ability in one. Einstein failed an entrance exam because of languages and history, and Ramanujan lost his scholarship because he neglected non-math subjects.

Evidence

  • Exam-day pollution. Israeli students scored lower on matriculation exams taken on days with more fine-particle pollution, and the same students had lower post-secondary attainment and earnings years later (Ebenstein, Lavy, and Roth, 2016).
  • Why it matters. A random disturbance on one exam day had lasting effects, showing that heavy reliance on single noisy tests misallocates talent.
  • Later studies. Pollution affected China's College English Test (Yao et al., 2023), and hot exam days lowered New York City exit exam scores by up to 13% of a standard deviation and reduced high school graduation (Park, 2022). Only the Israeli study followed students to adult earnings.
  • What helps. Flexible pathways and second chances. The evidence is moderate: one long-run natural experiment (rated B), with short-run replications.

Note: The Einstein and Ramanujan cases are a historical observation from the pioneer cases, not a finding from a controlled study.

Proposed and experimental methods

Methods that are proposed, under trial, approved in some places, or tried and then failed. Each shows a stage label and an evidence rating. A stage label shows how far a method has progressed, not whether it works. The stage labels are explained on the educational factor page.

  • Removing admission advantages that do not predict later success (Theoretical, B). Children from the top 1% of families are more than twice as likely as middle-class children with the same SAT or ACT scores to attend Ivy-Plus colleges, mainly because of preferences for alumni children, athletes, and non-academic ratings, which are uncorrelated or negatively correlated with outcomes after college, while test scores are highly predictive (Chetty et al., 2026). Attending such a college versus a flagship public university raised the chance of reaching the top 1% of earnings by about 50%, so who passes this gate matters.
  • Skills-based hiring that drops degree requirements (Approved but not scaled, contested, C). Many U.S. employers and some state and federal governments have announced that degrees are no longer required for some jobs. A review of hiring data concluded that many companies announced such changes but sustained changes in who is hired remain elusive for most (Sigelman et al., 2024).
  • Not shown to help: admission to exam-gated elite high schools for students near the cutoff (Large trial, B). In Boston and New York City, students just above the admission score for exam schools gained much higher-achieving peers but showed little effect on test scores or college quality (Abdulkadiroğlu et al., 2014). This suggests that the exam gate itself adds less than assumed for students near the cutoff, which bears on proposals to replace such gates with lotteries or wider entry.
  • Reversed: test-optional admissions at some selective colleges (Failed or reversed, contested, B). At nearly 100 private colleges that went test-optional between 2005-06 and 2015-16, the policy was associated with 3% to 4% more Pell Grant recipients and 10% to 12% more first-year students from underrepresented groups (Bennett, 2022). MIT reinstated its SAT and ACT requirement on March 28, 2022, stating that scores, especially in math, improve prediction of success and help identify well-prepared students from less-advantaged backgrounds (Schmill, 2022).

Sources cited on this page

  1. Ebenstein, A., Lavy, V., & Roth, S. (2016). The long-run economic consequences of high-stakes examinations: evidence from transitory variation in pollution. American Economic Journal: Applied Economics, 8(4), 36-65. DOI B Moderate
  2. Yao, Z., Zhang, W., Ji, X., & Weng, W. (2023). Short-term exposure to air pollution and cognitive performance: new evidence from China's College English Test. Environmental and Resource Economics, 85(1), 211-237. DOI B Moderate
  3. Park, R. J. (2022). Hot temperature and high-stakes performance. Journal of Human Resources, 57(2), 400-434. DOI B Moderate
  4. Chetty, R., Friedman, J. N., & Rockoff, J. E. (2014). Measuring the impacts of teachers II: teacher value-added and student outcomes in adulthood. American Economic Review, 104(9), 2633-2679. AEA C Limited: B for test-score effects
  5. Abdulkadiroğlu, A., Angrist, J., & Pathak, P. (2014). The elite illusion: Achievement effects at Boston and New York exam schools. Econometrica, 82(1), 137-196. link B Moderate
  6. Bennett, C. T. (2022). Untested admissions: Examining changes in application behaviors and student demographics under test-optional policies. American Educational Research Journal, 59(1), 180-216. link B Moderate
  7. Chetty, R., Deming, D. J., & Friedman, J. N. (2026). Diversifying society's leaders? The determinants and causal effects of admission to highly selective private colleges. The Quarterly Journal of Economics, 141(1). link B Moderate
  8. Schmill, S. (2022, March 28). We are reinstating our SAT/ACT requirement for future admissions cycles. MIT Admissions. link B Moderate
  9. Sigelman, M., Fuller, J., & Martin, A. (2024). Skills-based hiring: The long road from pronouncements to practice. Burning Glass Institute and Harvard Business School Project on Managing the Future of Work. link C Limited

Every source for this factor is listed on the educational factor page.