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We compare the expectations of Semi-Analytical Models (SAM) of galaxy evolution, to the largest available datasets of quasar host galaxies out to z=3.\n  Observed quasar hosts are consistent with no evolution from the local M(BH) - L(host) relation, and suggest a significant increase of the mass ratio Gamma = M(BH)/M(host) from z=0 to z=3. Taken at face value, this is totally at odds with the predictions of SAM, where the intrinsic Gamma shows little evolution and quasar host galaxies at high reds"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1110.6067","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-10-27T12:42:04Z","cross_cats_sorted":[],"title_canon_sha256":"516a57ad7d04c1312cba52ee27f0101fe21a4dd785141ad516fa2857710d8224","abstract_canon_sha256":"b8918a2966e2fafdee286f6e25a297576cae661c805e86cdc6bb80a770ce14c1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:03.119773Z","signature_b64":"pxjScS3jdbaP3JnAN1pB9g9EE4qEl0DjJqMojSHda2dp4rqdV0O9unmv/CiRIoJ0ulTJCOH7ARUbrfm3c3JGDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eecdde3b375a65a1c59e983f2e65213f3ba0be363f06bdfa8428cdb691d9fd94","last_reissued_at":"2026-05-18T02:00:03.119370Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:03.119370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the cosmological evolution of the black hole - host galaxy relation in quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"J. 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