| Claim | Test | Effect | Significance |
|---|
| Brand searches follow META spend (lag 1-8w) | weekly OLS, HAC-8, brand budget controlled | +0.34 | p = 0.007 · BFCM-excl. p = 0.022 |
| Brand searches follow GOOGLE spend | same model, head-to-head | −0.05 | p = 0.64 → rejected |
| Organic orders follow Meta (lag) | weekly OLS, HAC-8; placebo leads negative | +0.55 | p = 0.007 |
| Organic traffic follows Meta (lag) | weekly OLS, HAC-8 | +0.92 | p < 0.0001 |
| Direct traffic follows Meta (lag) | weekly OLS, HAC-8; 4w-differences p = 0.07 | +0.60 | p = 0.0005 |
| Hidden Meta in zero-click orders | survey share vs TikTok recall placebo | 17.6% vs 2.7% | p ≈ 9e-34 |
| Meta clicks inside organic closers | 2025H1 vs 2026, two-proportion z | 9.8% → 18.2% | p = 4e-11 |
| Efficiency break in the Meta era | break scan at every month, trend-controlled | MER +2.5x | peak t = 6.5–9.3 (Nov 25–Jan 26); no positive 2024 break (max t = 0.1) |