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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
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Week of 1 Jun 2026
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Topic · social

Supermarket Duopoly

14 posts · 3,525 engagement · first seen 27 Jul 2023 · last seen 3 Jun 2026

The article explores the challenges of introducing a third supermarket chain in New Zealand, highlighting the entrenched duopoly of Woolworths and Foodstuffs, the impact of zoning restrictions, and the political and economic obstacles to breaking up the market.

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.

  • twitter
    4 posts · 2,915 engagement
    2,915
  • reddit
    1 post · 395 engagement
    395
  • youtube
    6 posts · 30 engagement
    30
  • facebook
    1 post · 4 engagement
    4

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.