spb/wp2_uqo Public

- Audit found 8 fabricated citations in the original bib (Demers-Eisfeldt,
  Goodwin 2020, Huang-Ni, Lam et al., Li et al. 2023, Ozdogan, Hong 'LDA',
  Bayer 2016) — replaced with OpenAlex-verified real papers; 4 more corrected
  (Nowak-Smith venue, Shen->Shen-Ross JUE 2021, Gibbons 2015, Cheshire-Sheppard).
- 28 new verified references with DOI: text-as-data (Gentzkow-Kelly-Taddy,
  Ash-Hansen), hedonic identification (Ekeland-Heckman-Nesheim, Bajari-Benkard,
  Kuminoff et al.), quantile hedonics (Zietz et al., McMillen), listing language
  (Pryce-Oates, Haag et al., Grossman), spatial/Quebec (Anselin, Dubin, Can,
  Des Rosiers et al., Dube-Legros), vision (Glaeser et al.), interpretable ML
  (Rudin, SHAP, LIME), NLP (MTEB, zero-shot anchoring).
- Restructured literature review (new Text-as-Data section, two-sided gap),
  deepened intro, cited methodology choices, new 'Relation to Prior Findings'
  discussion subsection, softened unverifiable claims.
- Results, tables, figures, data untouched. PAPER_REVIEW.md + UPGRADE_REPORT.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>