Yin and Huang report that “People’s schedules are jointly determined by their biological clock and social clock. However, their social clock often deviates from the biological clock (e.g., having to get up earlier than one’s natural wake-up time for work or study, having to stay up to work night shifts or meet a project deadline)—a phenomenon known as ‘social jetlag.’ How does social jetlag impact consumer behaviour? Using field data and experiments, we show that social jetlag decreases conspicuous consumption…