Policy stringency and mental health during the COVID-19 pandemic: a longitudinal analysis of data from 15 countries

Lara B Aknin, PhD †, Bernardo Andretti, MSc †, Rafael Goldszmidt, PhD †, Prof John F Helliwell, DPhil †, Anna Petherick, DPhil †, Prof Jan-Emmanuel De Neve, PhD, Prof Elizabeth W Dunn, PhD, Daisy Fancourt, PhD, Prof Elkhonon Goldberg, PhD, Sarah P Jones, BSc, Ozge Karadag, MD, Elie Karam, MD, Prof Richard Layard, FBA, Prof Shekhar Saxena, MD, Emily Thornton, BA, Ashley Whillans, PhD, Jamil Zaki, PhD