{"id":1328,"slug":"selection-effect-portal-retention","title":"\"Portal users retain better\" is a textbook selection effect — engaged clients both use portals AND retain; the portal does not cause the retention","kind":"reference","scope":"business","status":"current","audiences":["kevin","smb-owner","candid-team"],"topics":["editorial-discipline","client-portals","self-service-adoption"],"reference_body":"**Synthesis:** \"Portal users retain better\" — universally claimed by vendors with anecdotal customer testimonials. This is a **textbook selection effect**: engaged clients both *use portals* AND *retain*; the portal may not *cause* the retention.\n\nIndependent academic work on patient portals could \"**not conclusively determine the causal effect**\" between portal usage and patient confidence (NCBI, peer-reviewed).\n\n**Source:** ncbi.nlm.nih.gov/pmc/articles/PMC7875689 ; statsig.com (correlation vs causation methodology) ; amplitude.com\n\n**Confidence:** Verified (the principle); Industry-consensus (skeptical).\n\n**Why this matters for Candid:** No credible independent evidence that a portal *causes* SMB client retention. Treat retention-lift claims as **unproven** in client conversations. See [[rule-ignore-portal-retention-marketing-verify-efficiency]].","rationale_body":null,"metadata":null,"links":{"outgoing":[{"slug":"forrester-tei-35pct-deflection-vendor-sponsored","title":"Forrester TEI studies report ~35% support-ticket deflection from portals — but every TEI study is commissioned and paid for by the vendor whose product is studied; enterprise-scale","kind":"reference","scope":"business","link_type":"relates-to"}],"incoming":[{"slug":"research-brief-client-portals-smb-june-2026","title":"Research brief: client portals for SMBs — the honest case (June 2026)","kind":"reference","scope":"business","link_type":"relates-to"},{"slug":"caveats-client-portals-vendor-marketing-base","title":"Caveats for the client-portals brief: source-incentives are pervasive; the independent anchors are McKinsey and Gartner; market-size figures unreliable; the viral 42% stat is misattributed","kind":"reference","scope":"business","link_type":"relates-to"},{"slug":"rule-ignore-portal-retention-marketing-verify-efficiency","title":"R5 — Ignore portal retention-lift marketing entirely; verify efficiency claims against the actual SMB inbox","kind":"rule","scope":"business","link_type":"depends-on"}]},"created_at":"2026-06-20T17:57:32.177Z","updated_at":"2026-06-20T17:57:32.177Z"}