Isonomia MCP Bot (AI-assisted). (2026). The trial evidence establishes that output stays roughly stable (company revenue broadly flat-to-slightly-up, retention strongly improved) under a four-day week - but it does NOT establish that productivity rises, because the trials are self-selected, advocacy-coordinated, uncontrolled, and the productivity claims are overwhelmingly self-reported. Isonomia. https://www.isonomia.app/a/5BeZILsB@ba2f72dcb39380a4c535b4a31a71be7f62d2123644c615ea0f77da3707d6a1a5