1# References that Crossref cannot verify (no DOI) — verified by fetching the publisher / repository / official page2# (resolve_dois.py records HTTP status, page <title>, and checks that `must_contain` appears in the page).3# Entries with `doi` are resolved through Crossref /works/{doi}. stream 7 = Quebec/Canada institutional context.4- {key: krugman1980, stream: 1, type: article, url: "https://ideas.repec.org/a/aea/aecrev/v70y1980i5p950-59.html", must_contain: "Scale Economies, Product Differentiation, and the Pattern of Trade",5 author: "Krugman, Paul", title: "Scale Economies, Product Differentiation, and the Pattern of Trade", container: "American Economic Review", volume: 70, issue: 5, pages: "950-959", year: 1980,6 why_needed: "Love-of-variety trade; variety as an outcome of market size (H2)"}7- {key: elberse2008, stream: 3, type: article, url: "https://hbr.org/2008/07/should-you-invest-in-the-long-tail", must_contain: "Should You Invest in the Long Tail",8 author: "Elberse, Anita", title: "Should You Invest in the Long Tail?", container: "Harvard Business Review", volume: 86, issue: "7/8", pages: "88-96", year: 2008,9 why_needed: "Long-tail counter-evidence: demand still concentrates on hits"}10- {key: beaumont2020, stream: 6, type: article, url: "https://www150.statcan.gc.ca/n1/pub/12-001-x/2020001/article/00001-eng.htm", must_contain: "probability surveys bound to disappear",11 author: "Beaumont, Jean-François", title: "Are probability surveys bound to disappear for the production of official statistics?", container: "Survey Methodology", volume: 46, issue: 1, pages: "1-28", year: 2020,12 why_needed: "Statistics Canada perspective on non-probability (web) data and selection"}13- {key: anderson2006, stream: 3, type: book, url: "https://openlibrary.org/books/OL13439130M/The_Long_Tail", must_contain: "The Long Tail",14 author: "Anderson, Chris", title: "The Long Tail: Why the Future of Business Is Selling Less of More", publisher: "Hyperion", year: 2006,15 why_needed: "Popular origin of the long-tail hypothesis (H3)"}16- {key: marshall1920, stream: 1, type: book, url: "https://www.econlib.org/library/Marshall/marP.html", must_contain: "Principles of Economics",17 author: "Marshall, Alfred", title: "Principles of Economics", publisher: "Macmillan (8th ed.; online edition, Library of Economics and Liberty)", year: 1920,18 why_needed: "Localised industries and external economies (Book IV, ch. X)"}19- {key: isq2024, stream: 7, type: report, url: "https://statistique.quebec.ca/fr/fichier/panorama-des-regions-du-quebec-edition-2024.pdf", must_contain: "",20 author: "{Institut de la statistique du Québec}", title: "Panorama des régions du Québec. Édition 2024", publisher: "Institut de la statistique du Québec, Québec", year: 2024,21 why_needed: "Official regional statistics (17 administrative regions, 104 MRC): population, labour market, income — external covariates for H2/H7"}22- {key: statcan2026cbc, stream: 7, type: report, url: "https://www150.statcan.gc.ca/n1/daily-quotidien/260213/dq260213c-eng.htm", must_contain: "Canadian business counts",23 author: "{Statistics Canada}", title: "Canadian business counts, December 2025", publisher: "The Daily, Statistics Canada, Ottawa (released 2026-02-13)", year: 2026,24 why_needed: "Business counts by geography and industry (employer vs non-employer); external benchmark for merchant counts"}25- {key: statcan_brdef, stream: 7, type: report, url: "https://www.statcan.gc.ca/en/statistical-programs/document/1105_D16_T9_V1", must_contain: "Business Register",26 author: "{Statistics Canada}", title: "Definitions and Concepts used in the Business Register (Business Register, record number 1105)", publisher: "Statistics Canada, Ottawa", year: "n.d.",27 why_needed: "Inclusion rules of the Business Register (payroll, $30,000 revenue, incorporation) behind Canadian Business Counts"}28- {key: statcan_br, stream: 7, type: report, url: "https://www23.statcan.gc.ca/imdb/p2SV.pl?Function=getSurvey&SDDS=1105", must_contain: "Business Register",29 author: "{Statistics Canada}", title: "Business Register (BR) — Integrated Metadata Base, record number 1105", publisher: "Statistics Canada, Ottawa", year: "n.d.",30 why_needed: "Methodology of the register from which Canadian Business Counts are derived"}31- {key: statcan_cius, stream: 7, type: report, url: "https://www23.statcan.gc.ca/imdb/p2SV.pl?Function=getSurvey&SDDS=4432", must_contain: "Canadian Internet Use Survey",32 author: "{Statistics Canada}", title: "Canadian Internet Use Survey (CIUS) — Integrated Metadata Base, record number 4432", publisher: "Statistics Canada, Ottawa", year: "n.d.",33 why_needed: "Household internet use and online shopping by province/urban-rural; demand-side adoption context"}34- {key: statcan2023cius, stream: 7, type: report, url: "https://www150.statcan.gc.ca/n1/daily-quotidien/230720/dq230720b-eng.htm", must_contain: "Canadian Internet Use Survey",35 author: "{Statistics Canada}", title: "Canadian Internet Use Survey, 2022", publisher: "The Daily, Statistics Canada, Ottawa (released 2023-07-20)", year: 2023,36 why_needed: "Latest CIUS headline results (internet use, online purchasing)"}37- {key: statcan_sdtiu, stream: 7, type: report, url: "https://www23.statcan.gc.ca/imdb/p2SV.pl?Function=getSurvey&SDDS=4225", must_contain: "Survey of Digital Technology and Internet Use",38 author: "{Statistics Canada}", title: "Survey of Digital Technology and Internet Use (SDTIU) — Integrated Metadata Base, record number 4225", publisher: "Statistics Canada, Ottawa", year: "n.d.",39 why_needed: "Enterprise-side e-commerce adoption by province and firm size"}40- {key: quebec_regions, stream: 7, type: report, url: "https://www.quebec.ca/gouvernement/portrait-quebec/geographie-territoire/regions-administratives", must_contain: "régions administratives",41 author: "{Gouvernement du Québec}", title: "Portraits des régions administratives", publisher: "Gouvernement du Québec, Québec", year: "n.d.",42 why_needed: "Official definition and list of the 17 administrative regions used as spatial units"}43- {key: quebec_aliments, stream: 7, type: report, url: "https://www.quebec.ca/agriculture-environnement-et-ressources-naturelles/agriculture/achat-local-tourisme-gourmand/reconnaitre-les-aliments-quebecois", must_contain: "Aliments du Québec",44 author: "{Gouvernement du Québec}", title: "Reconnaître les aliments québécois", publisher: "Gouvernement du Québec, Québec", year: "n.d.",45 why_needed: "Official description of the Aliments du Québec / Aliments préparés au Québec certification marks (origin evidence for H6)"}46- {key: alimentsqc, stream: 7, type: report, url: "https://www.alimentsduquebec.com/", must_contain: "Aliments du Québec",47 author: "{Aliments du Québec}", title: "Aliments du Québec — site officiel", publisher: "Aliments du Québec, Montréal", year: "n.d.",48 why_needed: "Certification body for Quebec food products"}49- {key: produitsqc, stream: 7, type: report, url: "https://lesproduitsduquebec.com/processus-de-verification", must_contain: "vérification",50 author: "{Les Produits du Québec}", title: "Processus de vérification — marques de certification Produit du Québec, Fabriqué au Québec, Conçu au Québec", publisher: "Les Produits du Québec", year: "n.d.",51 why_needed: "Certification criteria for non-food Quebec products (85% of direct costs in Quebec for 'Produit du Québec'; final substantial transformation for 'Fabriqué'; design workforce for 'Conçu') — only admissible origin evidence for H6"}52- {key: atn_netendances, stream: 7, type: report, url: "https://transformation-numerique.ulaval.ca/enquetes-et-mesures/netendances/", must_contain: "NETendances",53 author: "{Académie de la transformation numérique}", title: "NETendances — enquêtes sur les usages numériques des Québécois", publisher: "Académie de la transformation numérique, Université Laval, Québec", year: "n.d.",54 why_needed: "Quebec-specific survey programme on online shopping and digital usage (grey literature)"}55