{"id":2105,"slug":"reviews-as-conversion-moat","title":"Factor 5 — Trust/review moats (conversion, not just ranking)","kind":"reference","scope":"business","status":"current","audiences":["kevin","candid-team"],"topics":["review-revenue-causal-evidence"],"reference_body":"**Claim:** Reviews are the most-evidenced ranking AND conversion lever — and uniquely durable because they are rate-limited by actual customer transactions.\n\n**Causal evidence (the strongest in the entire ranking/conversion domain):**\n\n- **Luca HBS Yelp study** — 1-star Yelp increase CAUSES 5-9% revenue increase, driven by INDEPENDENT (non-chain) restaurants. See [[luca-hbs-yelp-one-star-revenue]].\n- **Northwestern Spiegel 2017** — 5 reviews → 270% purchase-likelihood lift; 380% for higher-priced products. See [[spiegel-2017-five-reviews-270-percent-lift]].\n- **The \"too good to be true\" effect** — purchase likelihood peaks 4.0-4.7 stars and DECLINES toward 5.0. See [[spiegel-too-good-to-be-true-effect]].\n\n**Why durable:**\n\n- Cannot legitimately be bought. FTC fake-review rule + Google policies prohibit incentivized/fake reviews; manipulation increasingly detectable.\n- Rate-limited by actual customer volume. A 500-review incumbent with 4.5 stars + steady inflow is one of the hardest positions for an SMB to attack — no shortcut closes it.\n\n**Consumer reliance (vendor, directional):** Just 4% of consumers say they \"never\" read online reviews (BrightLocal). Trust in reviews \"as much as personal recommendations\" fell 79% (2020) → 42% (2025) — see [[consumer-rating-thresholds-rising]] topic.\n\n**Why this matters for Candid:** Of all the levers an SMB can pull, sustained review velocity has the most causal evidence behind it. Should be among the strongest factor weights in the widget tier model — both as a difficulty signal (competitor reviews) and an action item (your own review velocity).","rationale_body":null,"metadata":null,"links":{"outgoing":[{"slug":"luca-hbs-yelp-one-star-revenue","title":"Luca HBS WP 12-016 — one-star Yelp = 5-9% revenue (regression-discontinuity, the causal anchor)","kind":"reference","scope":"business","link_type":"depends-on"},{"slug":"spiegel-2017-five-reviews-270-percent-lift","title":"Spiegel 2017 (Northwestern) — 5 reviews = 270% purchase likelihood lift; 380% for higher-priced","kind":"reference","scope":"business","link_type":"depends-on"},{"slug":"spiegel-too-good-to-be-true-effect","title":"Spiegel — purchase likelihood PEAKS at 4.0-4.7 stars and DECLINES toward 5.0 (too-good-to-be-true)","kind":"reference","scope":"business","link_type":"depends-on"}],"incoming":[{"slug":"research-brief-smb-widget-market-difficulty-june-2026","title":"Research brief: SMB widget market difficulty — six ranked factors (June 2026)","kind":"reference","scope":"business","link_type":"depends-on"}]},"created_at":"2026-06-23T19:16:04.234Z","updated_at":"2026-06-23T19:16:04.234Z"}