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What the picker changes
  • Top topics digest — the cards score the selected period against the prior 4 weeks.
  • 12-week heatmap & outlet matrix — show the 12 weeks ending at the selected week (they slide back with the picker, they aren’t a fixed snapshot).
  • Per-topic volume / alias drift — same 12-week trailing window, anchored on the selected period.
  • Coverage gap quadrant — scores the selected period against the 12 weeks before it (not including it).
  • Anomaly cards — only show alerts the detector fired during the selected period. Quiet weeks legitimately show none.
What stays as-is
  • Outlet orientation strip / lean colours — context-only, drawn from the last 12 weeks of activity regardless.
  • Co-occurrence graph — recent-activity anchored, not picker-driven.
  • Source & topic profiles — all-time data for the topic; the picker doesn’t affect them.
Rolling 7 days is a sliding live window for “current vibes”; switch to Weekly to compare specific weeks side-by-side.
Weekly Rolling 7 days
live window
Topic · social

Supermarket Duopoly

62 posts · 26,126 engagement · first seen 27 Jul 2023 · last seen 9 Sep 2026

The dominance of New Zealand's grocery market by two major supermarket chains, and ongoing policy debates and regulatory efforts — including Commerce Commission scrutiny and government-led reforms — aimed at increasing competition and reducing prices for consumers.

Stance breakdown

How the per-edge framings classify across 44 classified edges. Each framing is labelled by a small AI stance classifier; see the methodology page for details.

30%
70%
Supportive 13 Critical 31

Sentiment breakdown

Whole-post emotional valence across 44 classified posts that reference this topic. Distinct from stance: a post can be supportive of the topic and still negative in tone (an angry supporter) — the two together capture the texture short-form posts compress into very few words.

41%
16%
43%
Positive 18 Neutral 7 Negative 19

Platform mix

Where the conversation is happening. Engagement is volume-weighted (likes + 2×shares + 3×replies); a small number of high-impact posts can outrank a high-volume but low-engagement platform.

  • facebook
    10 posts · 14,757 engagement
    14,757
  • youtube
    26 posts · 3,779 engagement
    3,779
  • reddit
    5 posts · 3,527 engagement
    3,527
  • twitter
    3 posts · 513 engagement
    513

Top posts by engagement

The most-engaged posts referencing this topic. Engagement is likes + 2×shares + 3×replies; the order matches the digest ranking on /social.