Data Changelog

Download the OECD take-home country extract cited on this page: oecd-take-home-statistics.csv (CC BY 4.0).

This log lists material corrections and surface changes PlainGlobalPay applied after publication, including the 2026-08-09 accountability pathway, the 2026-08-09 honest sitemap lastmod stamps, the 2026-08-07 soft-404 and DEAD-research cleanup, and the 2026-08-05 ETL rebuild guard. Each entry is past-tense and tied to a repository commit; we do not invent rows to pad the list. How to report an issue is on the editorial & corrections policy and the typed corrections pathway. This public log starts on 2026-08-05. Data current as of 2026-07-24.

  1. · Accountability

    Added a typed /corrections pathway and this public changelog, and placed Cite this page blocks on about, privacy, terms, and contact so readers have a stable citation string and a clear route to report data issues.

  2. · Crawl freshness

    Switched static and rankings sitemap lastmods to per-route page-vintage stamps so crawl dates reflect real page edits instead of one portal-wide extract date.

  3. · Index-surface

    Replaced soft-404 redirects on unknown country, compare, and rankings hubs with real HTTP 404 responses so empty URLs stop looking like valid indexable pages.

  4. · Index-surface

    Noindexed the DEAD research hub and studies and emptied sitemap-research after admission evidence showed the class was not earning valid indexation.

  5. · Index-surface

    Soft-noindexed bleed pagination and related secondary surfaces that were advertising URL variants without enough unique content to earn a separate index slot.

  6. · Data integrity

    Hardened ETL so a full rebuild refuses to destroy unrepopulatable OECD-derived rows, protecting stages that cannot be rebuilt from a single extract.