Source registry

Tier 1: meta-analyses, systematic reviews, WHO-level guidelines and binding law. Tier 2: individual peer-reviewed studies, expert consensus statements and major reports. Tier 3: other credible sources, used sparingly. Every DOI is checked against Crossref and every link is checked before a page is approved.

• Alimujiang A, Wiensch A, Boss J, Fleischer NL, et al. (2019). Association Between Life Purpose and Mortality Among US Adults Older Than 50 Years. JAMA Network Open. doi:10.1001/jamanetworkopen.2019.4270

  Tier 2 Prospective cohort study (n = 6,985). Cited in: A sense of purpose and survival in later life

• Bull FC, Al-Ansari SS, Biddle S, Borodulin K, et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine. doi:10.1136/bjsports-2020-102955

  Tier 1 WHO guideline, systematic evidence review. Cited in: Movement at any intensity and the risk of dying early

• Ekelund U, Tarp J, Steene-Johannessen J, Hansen BH, et al. (2019). Dose-response associations between accelerometry measured physical activity and sedentary time and all cause mortality: systematic review and harmonised meta-analysis. BMJ. doi:10.1136/bmj.l4570

  Tier 1 Systematic review and harmonised meta-analysis (8 cohorts, n = 36,383). Cited in: Movement at any intensity and the risk of dying early

• European Parliament and Council of the European Union (2024). Regulation (EU) 2024/1689 laying down harmonised rules on artificial intelligence (Artificial Intelligence Act). Official Journal of the European Union. https://eur-lex.europa.eu/eli/reg/2024/1689/oj

  Tier 1 Binding EU regulation; Article 14 covers human oversight. Cited in: Keeping people in charge of consequential AI decisions

• Goddard K, Roudsari A, Wyatt JC (2012). Automation bias: a systematic review of frequency, effect mediators, and mitigators. Journal of the American Medical Informatics Association. doi:10.1136/amiajnl-2011-000089

  Tier 1 Systematic review (74 studies). Cited in: Keeping people in charge of consequential AI decisions

• Holt-Lunstad J, Smith TB, Layton JB (2010). Social Relationships and Mortality Risk: A Meta-analytic Review. PLoS Medicine. doi:10.1371/journal.pmed.1000316

  Tier 1 Meta-analysis (148 studies, n = 308,849). Cited in: Social connection and how long we live

• Kahneman D, Deaton A (2010). High income improves evaluation of life but not emotional well-being. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.1011492107

  Tier 2 Survey analysis (450,000+ Gallup responses). Cited in: Social connection and how long we live, Money and happiness: what an adversarial collaboration found, Why some countries are happier than others

• Killingsworth MA (2021). Experienced well-being rises with income, even above $75,000 per year. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.2016976118

  Tier 2 Experience sampling (1,725,994 reports, 33,391 adults). Cited in: Money and happiness: what an adversarial collaboration found

• Killingsworth MA, Kahneman D, Mellers B (2023). Income and emotional well-being: A conflict resolved. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.2208661120

  Tier 2 Adversarial collaboration, reanalysis. Cited in: Money and happiness: what an adversarial collaboration found

• Lucas RE, Clark AE, Georgellis Y, Diener E (2004). Unemployment Alters the Set Point for Life Satisfaction. Psychological Science. doi:10.1111/j.0963-7214.2004.01501002.x

  Tier 2 15-year longitudinal study (n > 24,000, Germany). Cited in: Losing work leaves a lasting mark

• Organisation for Economic Co-operation and Development (2019). OECD AI Principles. OECD.AI Policy Observatory. https://oecd.ai/en/ai-principles

  Tier 1 Intergovernmental standard, adopted 2019, updated 2024. Cited in: Keeping people in charge of consequential AI decisions

• Orben A, Przybylski AK (2019). The association between adolescent well-being and digital technology use. Nature Human Behaviour. doi:10.1038/s41562-018-0506-1

  Tier 2 Specification curve analysis (3 datasets, n = 355,358). Cited in: Teens, screens and well-being: a small association, carefully measured

• Paul KI, Moser K (2009). Unemployment impairs mental health: Meta-analyses. Journal of Vocational Behavior. doi:10.1016/j.jvb.2009.01.001

  Tier 1 Meta-analyses. Cited in: Losing work leaves a lasting mark

• United Nations General Assembly (1948). Universal Declaration of Human Rights. United Nations. https://www.un.org/en/about-us/universal-declaration-of-human-rights

  Tier 1 Foundational human rights instrument. Cited in: Human dignity is unconditional

• UNESCO (2021). Recommendation on the Ethics of Artificial Intelligence. UNESCO. https://www.unesco.org/en/artificial-intelligence/recommendation-ethics

  Tier 1 Global standard adopted by UNESCO member states. Cited in: Human dignity is unconditional

• Watson NF, Badr MS, Belenky G, Bliwise DL, et al. (2015). Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society. SLEEP. doi:10.5665/sleep.4716

  Tier 2 Expert consensus statement (modified RAND Appropriateness Method). Cited in: How much sleep adults need

• World Happiness Report editors (2024). World Happiness Report: Frequently Asked Questions. World Happiness Report. https://worldhappiness.report/faq/

  Tier 2 Explanation of the report's national-level model (Gallup World Poll data). Cited in: Why some countries are happier than others