The user wants a consolidated revision of all notes in this Mind. Output one Markdown note that is the current best statement of what is established about whether US universities grow or shrink due to AI over the next 20 years, with regional dependence.

Let me compile the durable claims from all the notes:

**Core answer:**
- "Both" — the system bifurcates and thins; region- and stratum-specific. Not uniform growth or shrink.
- Total enrollment drifts ~19M → ~14–15M by 2045 (Unverified)
- Institution count falls while degrees conferred roughly steady — "thins, doesn't shrink"
- Median campus roughly halves (aggressive claim)
- AI is an accelerant/sorter of existing trends, not primary cause
- Two-front squeeze: fewer 18-year-olds AND weakened degree signal
- Barbell: system shrinks at the median while top decile grows; total flat-to-down 10–20% outside flagships
- AI cost efficiency doesn't shrink the sector; it reallocates capacity — same efficiency monetized as headcount shrinkage in declining regions vs. growth capacity in growth states. Attrition timing: savings realized when vacated faculty lines aren't refilled.

**Demography (sourced):**
- Births 4.32M (2007) → ~3.59M (2023), ~17% decline (CDC/NCHS)
- HS grads peak ~3.9M/yr ~2025 (WICHE "Knocking at the College Door")
- Birth dearth hits college age 2029–2037
- NE/Midwest/Plains lose 10–20% college-age cohorts (WICHE); TX/FL/TN/GA/Carolinas grow
- WICHE ~13% decline in HS grads by 2041
- Net domestic migration to Sun Belt (Census Bureau)
- Regional divergence locks in demographically by late 2030s; AI converts headwind into closure rather than stagnation

**Regional/tier structure:**
- SEC-corridor applied flagships grow 30–50% headcount by ~2045
- Sun Belt gains across tiers (+10–25% seats through ~2040) as legislatures fund as economic development
- Nonselective Northeast/Midwest contracts roughly one-third; closures concentrated PA, OH, IL, New England
- Tier-moderated not geography-absolute: Ivies/elite Northeast privates insulated
- Real dividing line: endowment depth (privates) + state-subsidy commitment (publics); region sets the demand curve
- Intra-state bifurcation: within growth states money flows to flagships; tuition-dependent schools in SEC states can hollow out faster than NE peers
- By 2045 regional labels matter less than institutional balance sheets; the disruptable university is any tuition-first institution with AI-substitutable product
- Casualties in "sufficiency band": regional-public branches, SUNY comprehensives, tuition-dependent small privates below ~60% occupancy
- Program mix × region: licensed vs unlicensed share of credit hours = dominant predictor; licensed expansion takes 7–10 years (longer than declining-region runway); "program mix picks the winners, regional demography picks which losers can still switch"
- Three-exposure overlap: decline concentrates where thin endowments/tuition-dependence + shrinking cohorts + signal-exposed degrees stack
- SEC/Sunbelt growth is share-absorption, not sector expansion — the American university is moving, not growing
- Flagship-selective publics (Georgia Tech, Michigan, Ohio State) hold longest because selectivity is a positional good — until 2035–2045 window when credential decay may strip even selectivity-protected regionals

**Credential value / signaling:**
- Screening vs insurance decomposition: screening dies first; insurance (blame-shifting/liability) sticky through 2040s
- Degree survives as trust/insurance credential, not competence credential — AI can assay competence but not diligence/trust
- Selection-based signals AI-proof (sorting at 18); certification-based signals not
- Signaling migrates upward to selectivity/brand: "which degree" becomes the signal when "has a degree" stops discriminating
- Elite degrees gain value BECAUSE verification makes mid-tier signals redundant
- Licensed/statute-gated fields hold (nursing, law, accounting, teaching, engineering, medicine); licensure pins ~20% of US employment to degrees (Unverified on the 20%)
- Erosion hits by major before institution; fastest in generalist white-collar fields
- Scissors/youngest edge: new-grad premium flattens first — new-grad starting premium and posting degree-requirements turn down while adult premium holds
- Non-selective sell labor-market access → first-order elastic; selective bundle network/sorting → demand rises
- Slow clock, not cliff: ATS