(1) Data from the World Health Organization, in a report that points to more than 870,000 deaths per year worldwide from illnesses caused by sadness and stress felt when people do not have the social connections they would like to have.
(2) Digital Consumer 2021.
(3) Study from *Highlights* magazine (October 14, 2014), in *The Anxious Generation*, by Jonathan Haidt.
(4) Hall, J. A. (2018). "How many hours does it take to make a friend?" Journal of Social and Personal Relationships.
(5) Frögéli E, Jenner B, Gustavsson P. Effectiveness of formal onboarding for facilitating organizational socialization: A systematic review. PLoS One. 2023 Feb 16;18(2):e0281823. doi: 10.1371/journal.pone.0281823. PMID: 36795691; PMCID: PMC9934447.
(6) Gallup, Gallup Blog “Why the Onboarding Experience Is Key for Retention”.
(7) A. Pentland, “Honest Signals: How They Shape Our World” (Cambridge, Massachusetts: MIT Press, 2008), Appendix B.