As mobile technologies have proliferated in the 21st century, our technological toolkits have expanded in kind. Specifically speaking, apps like Venmo have allowed for quick and easy transfers of money electronically. But as writers and researchers at Harvard Business School asked in an April 2019 article, “Is the Digital Age Making Us Petty?” This week, we tackle this question in a consideration of how money operates between friends. One interesting find of the research: It’s more preferable in relationships to reimburse with rounded numbers than with specific amounts.