[vahid-ahmadi]

Analysing the UK Autumn Budget 2026 with PolicyEngine, the deck for the webinar on Wednesday 28 October 2026, at /slides/introduction-2026: what PolicyEngine is, how we prepared for Budget day, and a slide with the Autumn Budget 2026 dashboard embedded in it, where the analysis is presented.

Preview: https://policyengine-slides-git-introduction-823824-max-ghenis-projects.vercel.app/slides/introduction-2026 (redeploys on every push). After merging: https://policyengine.org/slides/introduction-2026.

Slides (5)

1. Cover: "Analysing the Autumn Budget 2026 with PolicyEngine" (no "UK" on the cover), the three presenters, "Webinar, Wednesday 28 October 2026, 4:30pm GMT".
2. What PolicyEngine is: policyengine.org's own one-line description (a nonprofit building free, open-source tools that help people understand tax and benefit policies), then three cards, the rules, the households and the results, with the main points of each, and "all the code is public".
3. How we prepared for Budget day, written for a general audience: a timeline from last year's Budget (26 November 2025, analysed on the day) through five Budget-day rehearsals to Budget day, then four points, each marked "Done" or "In review": fixed model and data (PolicyEngine 6.11.1, the version in the live dashboard's publication manifest and in the dashboard's lock file), the household calculator, every measure in about 8 minutes, and each measure published once reviewed. The technical detail (Modal, the drill issues, the Microcosm UK households) is in the speaker notes.
4. The analysis: live dashboard. The dashboard (https://ab2026-local-preview.vercel.app/uk/autumn-budget-2026) is embedded in the slide, with its address beside the title, and loads while slide 3 is showing. Buttons in its bar load Public finances, Pensioners (By age), Living standards and the Household calculator into the frame. Expand fills the screen with the same page, keeping whatever tab, measures and household are open; Back to the slide returns to the deck; New tab opens it in the browser. Once you click into the dashboard, the arrow keys and a clicker drive it (the arrows switch its tabs), so press Back to the slide or click the bar above it before moving on.
5. Close: "Thank you", the same dashboard's full address with a QR code (public/images/introduction-2026/dashboard-qr.svg, regenerated for that address and decoded to check it) and contacts.

No figures in the deck

The analysis is presented on the dashboard itself, so the deck carries no copy of its numbers and nothing goes stale when the dashboard's data change: the six chart slides, dashboardData.ts, build_dashboard_data.py, slides/figures.tsx and their CSS are removed.

Also

• Merges main (the Good Growth Foundation and Scottish Government decks); the registry conflict is resolved with all three decks listed.
• Removes the press, publications, 2025 dashboard and ideas slides, and the 19 screenshots only they used.
• Speaker notes and README rewritten for the new deck.
• Laid out like the BLS and CPID decks: the title and accent bar on each slide, sources under the content, and the footer text kept clear of the viewer's slide counter.

🤖 Generated with Claude Code

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
policyengine-slides	Ready	Preview	Oct 28, 2026 12:08pm UTC

[vahid-ahmadi]

Updated in ef40fcd (Build, Lint and Tests pass; Vercel preview deployed).

Slide 3, How we prepared for Budget day

• "Five mock Budgets": 28 September and 5, 12, 19 and 26 October (Drill 5 is dashboard issue #144).
• "A household calculator": adds "It runs on Modal and is kept warm."
• "Every measure in about 8 minutes": now Done, since dashboard #178 merged today. The text is now "All national results run on Modal, one machine per measure, for every measure and the combined package." The run took 8.1 minutes for all ten units on 26 October. The old "identical to a one-at-a-time run" claim is gone: #178 reports last-digit differences (up to 7.4e-10 relative) in some 2026 rows.
• "Each measure published once reviewed" stays In review (#104, #106 and #133 are still open).

Slide 5, The analysis: live dashboard

• The old tab buttons were removed in 56b9755, when the dashboard was embedded. Four view buttons now sit in the embed bar, next to Expand and New tab. Each one loads a view into the same frame:
  • Public finances: ?tab=dashboard
  • Pensioners: ?tab=dashboard&sub=pensioners
  • Living standards: ?tab=dashboard&sub=living
  • Household impact: ?tab=household
• Living standards links to the sub-tab, not ?tab=living, because on dashboard #185 ?tab=living is an alias for Pre-measures forecast.
• These links match dashboard #185, which is not merged. The live site still has the old tabs (Population impact, Household impact, Living standards, Methodology) and no Pensioners sub-tab. Until #185 merges, the Pensioners and Living standards buttons do not open their sub-tabs.
• Each click reloads the frame, so any measures or household chosen in it are reset. The speaker notes say so.

Speaker notes and README

• §3: five drills (issue #144 added) and the Modal timing.
• §5: the new tab list: Population impact (Public finances as the default, All households, Young people, Pensioners, Living standards, Poverty), Household impact, Pre-measures forecast, Policies and Methodology, plus a note that this depends on #185.
• The old line about the household result taking "about a minute" is removed.
• README: the analysis slide's bar buttons.

I checked the other slides (What PolicyEngine is, Past Budgets, Close). None of them names a dashboard tab or a drill count, so nothing else needed changing.

Not merged.

[vahid-ahmadi]

Slide 4 (Past Budgets) removed at Vahid's request (f5514e5): the deck is now 5 slides. Public link, no login needed: https://ab2026-webinar-slides.vercel.app/slides/introduction-2026 (a separate Vercel project, ab2026-webinar-slides, in the policy-engine team, deployed from this branch's head).