HYPSM Common Data Set: Admissions Statistics

data_hypsm_cds.md

HYPSM Common Data Set: Admissions Statistics

Comprehensive admissions data for Harvard, Yale, Princeton, Stanford, and MIT compiled from Common Data Sets (2023-24, 2024-25) and official institutional sources.

Harvard

Historical Applications & Acceptance Rates

Source: Harvard OIRA Fact Book (updated Jan 2026)

CDS 2023-24 (Class of 2028) Detailed Data

Applications by Round:

Note: CDS 2023-24 reports on students entering Fall 2023 (Class of 2027). The figures above reflect the CDS document's reported numbers.

SAT Scores (Middle 50%):

ACT Scores (Middle 50%):

GPA Distribution (Enrolled Students):

Class Rank:

• Top tenth: 93.1%

• Top quarter: 98.9%

• Top half: 99.7%

Demographics (First-Year Enrolled, N=1,645):

Sources:

• Harvard CDS 2023-24 PDF

• Harvard Admissions Statistics

• commondatasets.fyi/harvard

Yale

Historical Applications & Acceptance Rates

Sources: Yale OIR, Yale Daily News

CDS 2023-24 (Class of 2028) Detailed Data

Applications by Round:

Note: CDS 2023-24 reports enrolled Fall 2023 class.

SAT Scores (Middle 50%):

ACT Scores (Middle 50%):

CDS 2024-25 (Class of 2029) Updates

• Total applicants: 57,517

• Admitted: 2,227

• Enrolled: 1,554

• Acceptance rate: 3.9%

• SAT Composite (middle 50%): 1480-1560

• ACT Composite (middle 50%): 33-35

• Test submission: 61% SAT, 25% ACT

Class Rank:

• Top tenth: 96%

• Top quarter: 99%

• Top half: 100%

Demographics (2024-25 CDS):

Sources:

• Yale CDS 2023-24 PDF

• Yale CDS 2024-25 PDF

• Yale OIR Common Data Set

• Cosmic College Consulting Yale 2024-25

Princeton

Historical Applications & Acceptance Rates

Note: Princeton withheld admissions data for Class of 2027 and partially for Class of 2026. Class of 2026 rate reflects expanded enrollment.

Sources: Princeton OIR, Princeton Admission

CDS 2023-24 (Class of 2028) Detailed Data

Applications by Round:

SAT Scores (Middle 50%, 57% submitted):

ACT Scores (Middle 50%, 20% submitted):

GPA Distribution (Enrolled Students):

Class Rank:

• Top tenth: ~95% (estimated)

• Top quarter: ~99%

• Top half: ~100%

Early Action Historical Rates:

Sources:

• Princeton CDS 2023-24

• Princeton CDS 2024-25

• commondatasets.fyi/princeton

• Daily Princetonian

Stanford

Historical Applications & Acceptance Rates

Sources: Stanford IRDS, Stanford Report

CDS 2023-24 (Class of 2027) Detailed Data

Applications by Round:

SAT Scores (Middle 50%, 47% submitted):

ACT Scores (Middle 50%, 22% submitted):

GPA Distribution (Enrolled Students):

Average unweighted GPA: 3.9

Class Rank:

• Top tenth: ~96%

• Top quarter: ~100%

• Top half: 100%

CDS 2024-25 (Class of 2029) Updates

• Total applicants: 57,326

• Admitted: 2,067

• Enrolled: 1,693

• Acceptance rate: 3.6%

• SAT Composite (middle 50%): 1510-1570

• ACT Composite (middle 50%): 34-35

• Perfect 4.0 GPA: 73.3%

• Average GPA: 3.94

• Top tenth: 97.8%

Demographics (2024-25 CDS, First-Year):

Demographics (2023-24 CDS, First-Year, N=1,699):

Sources:

• Stanford IRDS CDS page

• Stanford Common Data Set 2023-24

• Cosmic College Consulting Stanford 2024-25

MIT

Historical Applications & Acceptance Rates

Sources: MIT Admissions Statistics, MIT Institutional Research

CDS 2023-24 (Class of 2027) Detailed Data

Applications by Round:

SAT Scores (Middle 50%, 83% submitted):

ACT Scores (Middle 50%, 31% submitted):

GPA:

• Average weighted GPA: 4.17

• Detailed distribution not published in CDS

CDS 2024-25 (Class of 2029) Updates

Applications by Round:

SAT Scores (Middle 50%):

ACT Scores (Middle 50%):

• Composite: 34-36

Domestic vs. International:

Demographics (First-Year, N=1,092, from CDS 2023-24):

Sources:

• MIT CDS 2023-24

• MIT CDS 2024-25

• MIT Admissions Stats

• commondatasets.fyi/mit

Summary Comparison Table

Acceptance Rates (Most Recent: CDS 2024-25 / Class of 2029)

SAT Scores Comparison (Middle 50%, 2023-24 CDS)

ACT Scores Comparison (Middle 50%, 2023-24 CDS)

GPA Distribution Comparison (% with 4.0)

Early Round Advantage (2023-24 CDS)

Note: MIT's Early Action is non-restrictive (not SCEA/REA), so its early pool is less self-selected, resulting in a lower early advantage multiplier.

Acceptance Rate Trends (2019-2025)

Key: N/R = Not Released. Class 2024 reflects COVID-era gap year deferrals inflating acceptance rates. Class 2025+ reflects test-optional surge in applications.

Key Observations for Simulation Calibration

1. Acceptance rate range: HYPSM rates cluster between 3.2% and 4.8% in recent cycles (excluding COVID-era Class of 2024). A simulation default of 3.5-5.0% is appropriate.

2. Early round multiplier: Princeton's SCEA shows the strongest early advantage (15.8% vs 2.9% RD = 5.5x). Harvard and Yale cluster around 3x. MIT's non-restrictive EA shows only 1.5x. For simulation purposes, a 2-3x ED/EA multiplier for HYPSM is reasonable, with Princeton as an outlier.

3. SAT convergence: All five schools have nearly identical SAT middle-50% bands (1500-1580). The primary differentiator is MIT's Math floor (780 vs 760 at others).

4. GPA ceiling effect: 67-75% of enrolled students have a perfect 4.0, making GPA a weak differentiator at HYPSM. The simulation's sigmoid academic index should flatten near the top.

5. Yield rates: Harvard (84%) and Stanford (82%) lead in yield. Yale's yield is notably lower (~70%), suggesting more cross-admits choosing competitors. MIT yield is high (~82%) due to STEM specialization reducing overlap.

6. Application volume: Yale and Stanford receive the most applications (~57K), while MIT receives the fewest (~29K) due to STEM focus. Princeton (~40K) is in the middle. The simulation should reflect these different pool sizes.

7. Test submission rates: MIT has the highest SAT submission rate (83%) while Stanford has the lowest (47%). This reflects different test-optional policies and may affect how test scores should be weighted in the simulation.

Data compiled March 2026. All figures from official institutional sources and Common Data Set filings. Some historical figures are approximate where institutions have not released exact numbers.