Source

RAND Europe 2016《Why sleep matters – the economic costs of insufficient sleep》RR1791〔日本 GDP 1.86–2.92%；睡眠 <6 小時死亡風險 +13%〕

https://www.rand.org/content/dam/rand/pubs/research_reports/RR1700/RR1791/RAND_RR1791.pdf