Top funders of AI research (weekly)

Weekly ranking of who funds AI research, from the official keyless OpenAlex API (https://api.openalex.org, CC0 data). Trailing 30 complete days: works tagged with the Artificial intelligence concept (C154945302) are grouped by funder (top 200), and a second all-works group_by over the same window (batched, with a single-count fallback) supplies each funder's total output so an AI share of its own production can be computed; the sweep's total hit count yields each funder's share of ALL AI works in the window (full attribution, but the tracked funders cover only a small fraction of window AI works because OpenAlex funder metadata is incomplete upstream). Funder identity is resolved on OpenAlex's canonical ids, so one agency never appears twice; the free-text funder description is mapped to a deterministic closed funder-class taxonomy; countries are normalized to ISO alpha-3 via hub.normalize. The impact_score is a documented 0-100 composite = 50% min-max-normalized AI works per day + 50% min-max-normalized AI share of trailing-30-day output, and funder_rank orders by impact_score descending (ties: AI works desc, then OpenAlex id). As-of stamping is day-granular (window end), so re-running inside the same window is a no-op. Columns: ISO week of the window end, as-of date, window start/end, OpenAlex id / funder URL / name / description, ISO alpha-3 country code and name, funder class, AI works and total works in the window, AI share (%), AI works per day, funding share of all window AI works (%), impact score (0-100), funder rank. Primary key: (week, openalex_id). Cadence: weekly. Nullability: country_code, homepage_url, funder_description may be empty when OpenAlex has none; ai_works, total_works, ai_share_pct, impact_score and funder_rank are never null. Caveats: funding metadata is incomplete upstream — works without funder attribution are excluded, so this ranks the most *visible* AI funders, not the whole funding landscape; counts are full (not fractional) attributions, so a work credits every listed funder; OpenAlex concept tagging is automated. Sample use: order by funder_rank for the week's leading AI funders, or filter funder_class = 'national_research_funder'.