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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.
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