Ground Walk Score conjecture (Duncan et al. 2011), freeze version date
- Added verified reference: Duncan, Aldstadt, Whalen, Melly & Gortmaker (2011), IJERPH 8(11), 4160-4179, DOI 10.3390/ijerph8114160 (verified via PubMed/MDPI) — validation of Walk Score across four US metros, supporting the market-specific-meaning mechanism in the discussion. - Title page date frozen to August 5, 2026 (was \today). - Build: 60 pages, 0 errors, 0 undefined refs, 0 overfull boxes, 70/70 references cited. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
6 changed files +27 −11
modified
README.md
+1 −1
@@ -18,7 +18,7 @@ | |||||
| 18 | [](#-data) | 18 | [](#-data) | ||
| 19 | [](#-data) | 19 | [](#-data) | ||
| 20 | [](#-figures) | 20 | [](#-figures) | ||
| 21 | −[-2E8B57)](paper/references.bib) | 21 | +[-2E8B57)](paper/references.bib) | ||
| 22 | [](#-verification--integrity) | 22 | [](#-verification--integrity) | ||
| 23 | [](#-citation) | 23 | [](#-citation) | ||
| 24 | 24 | ||||
modified
UPGRADE_REPORT.md
+8 −6
@@ -127,10 +127,12 @@ prediction; `bishop2020best`/`rosen1974hedonic` for the SHAP-is-not-WTP claim). | |||||
| 127 | 2. **Campbell, Giglio & Pathak (2011) magnitude** — ✅ verified against the AER | 127 | 2. **Campbell, Giglio & Pathak (2011) magnitude** — ✅ verified against the AER | ||
| 128 | abstract: average foreclosure discount of 27\% on Massachusetts transactions. | 128 | abstract: average foreclosure discount of 27\% on Massachusetts transactions. | ||
| 129 | Text unchanged (accurate). | 129 | Text unchanged (accurate). | ||
| 130 | −3. **“Walk Score's metro-relative construction” conjecture** — the claim that | 130 | +3. **“Neighborhood scores carry market-specific meaning” conjecture** — ✅ now | ||
| 131 | − neighborhood scores carry market-specific scale is now explicitly flagged in | 131 | + partially grounded: Duncan et al. (2011, *IJERPH* 8(11), 4160–4179, DOI | ||
| 132 | − the discussion as “plausible rather than established.” If you have a source on | 132 | + 10.3390/ijerph8114160; verified via PubMed/MDPI) validate Walk Score across | ||
| 133 | − Walk Score's construction, it could be cited there. | 133 | + four US metropolitan areas and find its correspondence with walkability | ||
| 134 | + constructs varies by metro. Cited in the discussion; the mechanism remains | ||||
| 135 | + flagged as “plausible rather than established” since we do not test it. | ||||
| 134 | 4. **Positioning sentence** — “To our knowledge, this framing has not previously | 136 | 4. **Positioning sentence** — “To our knowledge, this framing has not previously | ||
| 135 | been brought to bear on national-scale hedonic housing models” (end of | 137 | been brought to bear on national-scale hedonic housing models” (end of | ||
| 136 | literature §validation). Standard novelty hedge, but worth your sign-off. | 138 | literature §validation). Standard novelty hedge, but worth your sign-off. | ||
@@ -157,8 +159,8 @@ prediction; `bishop2020best`/`rosen1974hedonic` for the SHAP-is-not-WTP claim). | |||||
| 157 | ## 7. Build status & typographic fixes | 159 | ## 7. Build status & typographic fixes | ||
| 158 | 160 | ||||
| 159 | `latexmk` clean build: **60 pages, 0 errors, 0 undefined references/citations, | 161 | `latexmk` clean build: **60 pages, 0 errors, 0 undefined references/citations, | ||
| 160 | −0 overfull vboxes**, 69/69 entries cited, hyperlinks resolving. Version 1.1, | 162 | +0 overfull vboxes**, 70/70 entries cited, hyperlinks resolving. Version 1.1; title-page | ||
| 161 | −dated \today at compile time (freeze before submission if desired). | 163 | +date frozen to August 5, 2026 for submission. | ||
| 162 | 164 | ||||
| 163 | Two pre-existing typographic defects were found and fixed during the final QA | 165 | Two pre-existing typographic defects were found and fixed during the final QA | ||
| 164 | pass: the main OLS table (Table 5) and the appendix full-OLS landscape table | 166 | pass: the main OLS table (Table 5) and the appendix full-OLS landscape table | ||
modified
paper/main.pdf
+0 −0
Binary file not shown.
modified
paper/references.bib
+11 −0
@@ -385,6 +385,17 @@ at-sign cannot appear here. | |||||
| 385 | doi = {10.1093/rfs/hhz134}, | 385 | doi = {10.1093/rfs/hhz134}, | ||
| 386 | } | 386 | } | ||
| 387 | 387 | ||||
| 388 | +@article{duncan2011validation, | ||||
| 389 | + author = {Duncan, Dustin T. and Aldstadt, Jared and Whalen, John and Melly, Steven J. and Gortmaker, Steven L.}, | ||||
| 390 | + title = {Validation of {W}alk {S}core for estimating neighborhood walkability: {A}n analysis of four {US} metropolitan areas}, | ||||
| 391 | + journal = {International Journal of Environmental Research and Public Health}, | ||||
| 392 | + year = {2011}, | ||||
| 393 | + volume = {8}, | ||||
| 394 | + number = {11}, | ||||
| 395 | + pages = {4160--4179}, | ||||
| 396 | + doi = {10.3390/ijerph8114160}, | ||||
| 397 | +} | ||||
| 398 | + | ||||
| 388 | @article{pivo2011walkability, | 399 | @article{pivo2011walkability, | ||
| 389 | author = {Pivo, Gary and Fisher, Jeffrey D.}, | 400 | author = {Pivo, Gary and Fisher, Jeffrey D.}, | ||
| 390 | title = {The walkability premium in commercial real estate investments}, | 401 | title = {The walkability premium in commercial real estate investments}, | ||
modified
paper/sections/discussion.tex
+6 −3
@@ -122,9 +122,12 @@ held-out data. | |||||
| 122 | 122 | ||||
| 123 | The ablation analysis identifies \emph{what} fails to transfer. Neighborhood | 123 | The ablation analysis identifies \emph{what} fails to transfer. Neighborhood | ||
| 124 | features contribute the largest random-validation gain ($+17.6$ pp) but only | 124 | features contribute the largest random-validation gain ($+17.6$ pp) but only | ||
| 125 | −$+3.5$ pp under geographic holdout---consistent with our conjecture that scores | 125 | +$+3.5$ pp under geographic holdout---consistent with the conjecture that scores | ||
| 126 | −like Walk Score and school ratings carry market-specific scaling; we flag this | 126 | +like Walk Score and school ratings carry market-specific meaning. Validation | ||
| 127 | −mechanism as plausible rather than established, since we do not test it directly. | 127 | +research on Walk Score itself finds that its correspondence with underlying | ||
| 128 | +walkability constructs varies across metropolitan areas | ||||
| 129 | +\citep{duncan2011validation}, which supports the mechanism, though we do not | ||||
| 130 | +test it directly and flag it as plausible rather than established. | ||||
| 128 | More striking, the features most obviously "about" geography are actively harmful | 131 | More striking, the features most obviously "about" geography are actively harmful | ||
| 129 | out-of-market: the full model with region dummies loses 7.6 pp of geographic | 132 | out-of-market: the full model with region dummies loses 7.6 pp of geographic | ||
| 130 | holdout $R^2$ relative to the market-status stage, and adding raw coordinates | 133 | holdout $R^2$ relative to the market-status stage, and adding raw coordinates | ||
modified
paper/sections/titlepage.tex
+1 −1
@@ -41,7 +41,7 @@ | |||||
| 41 | 41 | ||||
| 42 | % --- Date & Version --- | 42 | % --- Date & Version --- | ||
| 43 | {\normalsize First draft: May 2026}\\[0.1cm] | 43 | {\normalsize First draft: May 2026}\\[0.1cm] | ||
| 44 | −{\normalsize This version: \today}\\[0.1cm] | 44 | +{\normalsize This version: August 5, 2026}\\[0.1cm] | ||
| 45 | {\small\itshape Version~\WPversion} | 45 | {\small\itshape Version~\WPversion} | ||
| 46 | 46 | ||||
| 47 | \end{center} | 47 | \end{center} | ||
| 48 | 48 | ||||