spb/wp5_uqo Public

1<!-- Author: Simon-Pierre Boucher — contact@spboucher.ai -->23# PAPER_REVIEW — Critical assessment before the scholarly upgrade45Assessment of `paper/` (UQO WP5, 43-page build of 2026-08-05) and of the analysis6code in `scripts/`/`src/`, written **before** the literature expansion. Results,7data, and figures are out of scope: only framing, positioning, and scholarship8are assessed.910## 1. Core contribution — stated, but under-positioned1112The paper claims three contributions (intro, ¶6): (i) first granular13listing-level analysis of the Airbnb–rent nexus in Quebec; (ii) a multi-method14design (hedonic OLS, SAR/SEM, quantile, ML) on a single dataset; (iii) policy15relevance for Canadian short-term-rental (STR) regulation. These are credible16but under-argued:1718- The **"first for Quebec"** claim is asserted without engaging the Canadian STR19  literature at all — notably the McGill group's work on STRs in Canadian cities20  (Wachsmuth and coauthors), which quantified Montreal's STR market and21  housing-loss estimates. Without citing it, contribution (i) is exposed.22- The **multi-method** point is defensible but currently reads as a list; it23  should be framed against the identification hierarchy of the field (IV,24  quasi-experiments, panels) — i.e., what a careful cross-sectional25  multi-method study adds *given* that stronger designs exist elsewhere.26- The buffer-based exposure construction (exact Haversine counts at 250 m–2 km27  around each rental listing) is arguably the paper's most distinctive28  methodological feature and deserves to be foregrounded as such.2930## 2. Literature review — thin and dated for a 2026 paper3132The current §2 has ~24 references and six one-paragraph subsections. Major gaps:33341. **Quasi-experimental Airbnb–housing studies are absent.** The review stops at35   Barron et al., Horn & Merante, Garcia-López et al., Sheppard & Udell. Missing:36   Los Angeles ordinance evidence (Koster–van Ommeren–Volkhausen), New Orleans37   regulation (Valentin), Berlin (Duso et al.), Portugal (Franco & Santos),38   France (Ayouba et al.), London (Shabrina et al.), Amsterdam/hotel margins,39   and the NYC distributional analysis (Calder-Wang). These are the papers a40   referee will name first.412. **No Canadian evidence.** Combs–Kerrigan–Wachsmuth (national STR analysis),42   Wachsmuth–Weisler is cited but only for the rent-gap concept, and the43   Toronto displacement work (Grisdale) is absent. For a Quebec paper this is44   the single most damaging gap.453. **Sharing-economy economics** (peer-to-peer market design and welfare):46   Zervas et al. (hotel displacement), Farronato & Fradkin (welfare effects),47   Einav–Farronato–Levin (P2P markets), Sundararajan (book) — none cited. These48   ground the supply-diversion mechanism the paper leans on.494. **Airbnb pricing hedonics** (Model 2 has no dedicated literature): Wang &50   Nicolau, Gibbs et al., Ert et al. on trust/reputation — the superhost51   discount found in Table 4 cannot be discussed against prior findings without52   them.535. **Hedonic methodology**: only Rosen + two survey chapters. Missing Lancaster54   (characteristics demand), Sirmans et al. (empirical composition survey),55   Kuminoff–Parmeter–Pope (specification reliability), Malpezzi (applied56   review).576. **Spatial econometrics**: Anselin and LeSage & Pace are cited, but the58   actual estimators used (GM_Lag / GM_Error) descend from **Kelejian & Prucha59   (1998, 1999)** — currently uncited, which is a methods-citation hole. Housing60   applications (Can; Dubin) also absent.617. **Quantile regression**: only Koenker–Bassett + Zietz et al. Missing the62   canonical applied reference (Koenker & Hallock) and housing-distribution63   work (McMillen).648. **ML methods**: Zou & Hastie (elastic net) uncited although the method is65   used; scikit-learn (Pedregosa et al.) uncited although it produced every ML66   number.679. **Tourism gentrification**: Wachsmuth–Weisler is there, but the strand's68   antecedents (Gotham's "tourism gentrification"; Cocola-Gant; Gurran & Phibbs69   on planning responses) are absent, leaving §7's policy discussion70   free-floating.7172## 3. Weak or unsupported argumentation7374- **Intro ¶3 (Quebec context)**: "over 11 million visitors annually", "vacancy75  rates … historically low levels" — plausible but uncited; either cite a76  source that can be verified or soften to qualitative statements. *Flagged for77  the author rather than silently sourced.*78- **§5.2 superhost discount**: the composition-effect interpretation is offered79  without any literature on reputation pricing (Ert et al.; Gibbs et al. find80  superhost *premia* — a disagreement worth stating).81- **§6.5 ring decomposition** is honest but isolated; connecting it to the82  spatial-decay findings in Garcia-López et al. and Koster et al. would turn a83  caveat into a comparison.84- **Discussion** interprets magnitudes only against the paper's own numbers;85  no comparison of the 0.4%-per-listing semi-elasticity with Barron et al.'s86  elasticity, Horn & Merante's 0.4% per one-SD, Koster et al.'s ~2% price/rent87  drops from bans, Franco & Santos, or Ayouba et al. The single most useful88  addition a reader could ask for.89- **Limitations** are listed (6 items) but not developed: no discussion of90  measurement error in scraped exposure (platform coverage), MAUP/buffer-choice91  issues, or asking-vs-contract rent literature.9293## 4. Underdeveloped sections (length audit)9495| Section | Current state | Verdict |96|---|---|---|97| 1 Introduction | 7 ¶, good flow | Needs: Canadian/Quebec literature hook, contribution sharpening vs. quasi-experimental strand, magnitude preview |98| 2 Literature | ~2.5 pp, 6 mini-sections | **Weakest section** — needs thematic restructuring + ~25 new refs |99| 3 Data | Solid | Minor: platform-coverage citation |100| 4 Methodology | Solid post-restructuring | Needs method citations (K&P 1998/1999; Zou–Hastie; Koenker–Hallock; Pedregosa) |101| 5 Results | Accurate post-correction | Add brief literature anchors when interpreting (superhost, quantile pattern) |102| 6 Robustness | Strong after Table 12 | Fine |103| 7 Discussion | 5 subsections, ~3 pp | Needs: magnitude comparison table vs. prior studies, expanded limitations, future work |104| 8 Conclusion | Fine | Light touch |105106## 5. Positioning: current vs. target107108**Currently reads as:** a competent regional case study with a methods buffet.109**Should read as:** the first listing-level, multi-method quantification of the110Airbnb–rent association for Quebec — a market with distinctive regulation (CITQ111registration, Bill 25) and Canada's second-largest STR market — explicitly112placed *between* the correlational early literature and the quasi-experimental113strand, with transparent identification limits and magnitudes benchmarked114against both.115116## 6. Upgrade plan (executed in Phases 2–3)1171181. Verify and add ~25–30 references (OpenAlex-verified metadata, DOIs) →119   target ≈ 50–55 total.1202. Restructure §2 into thematic subsections: (a) STR platforms & housing costs121   — correlational to quasi-experimental; (b) Canadian & Quebec evidence;122   (c) sharing-economy market effects; (d) STR pricing hedonics; (e) hedonic123   theory & practice; (f) spatial econometrics; (g) distributional/quantile;124   (h) ML in housing; (i) tourism gentrification & regulation.1253. Introduction: +3 paragraphs (positioning, Canadian gap, magnitude preview).1264. Methods: ground every estimator with its source.1275. Discussion: add "Findings in context of the literature" subsection with a128   magnitude-comparison narrative; expand limitations (measurement error, MAUP,129   asking rents) and future work.1306. Length target: ≈ +30 % prose (43 → ~55 pages).131132## 7. Items the author must verify (not resolved by me)133134- The uncited factual claims in intro ¶3 (visitor counts, vacancy rates).135- Whether "first granular listing-level analysis for Quebec" survives the136  McGill-group literature now cited (I have worded the claim more precisely:137  first *listing-level hedonic/econometric* study for Quebec, distinguishing it138  from the McGill descriptive/market-measurement work).139- The regulatory description of CITQ registration and Montreal borough rules140  (§7.2) is uncited; verify against current provincial law (Bill 25, 2023).141