Mappiness (LSE)
MacKerron & Mourato. 3+ million happiness observations from 60,000+ UK participants via smartphone app, 2010–2022.
Used for all happiness impact scores. mappiness.org.uk
American Time Use Survey 2024
U.S. Bureau of Labor Statistics, USDL-25-1060, June 2025. Primary source for time spent on activities. bls.gov/tus
Pew Research Center
"Americans' Social Media Use 2025." Nov 2025. Used for social media time data. pewresearch.org
Track Your Happiness
Killingsworth & Gilbert (2010). "A Wandering Mind Is an Unhappy Mind." Science 330(6006).
Corroborates activity-happiness rankings. trackyourhappiness.org
Census Bureau / ACS
American Community Survey. Average one-way commute time 27.6 min (2022).
Used for commuting time estimates.
Methodology: Happiness scores are relative to each person's baseline average
(e.g., +8.12 means "8.12 points happier than your personal average while exercising").
Time data represents averages across all Americans 15+, including weekdays and weekends.
Social media time combines smartphone + desktop usage. Activities sorted by happiness
impact score, highest to lowest.