Studies by Dahl and various coauthors have pioneered the use of prescription data to assess the effects of organizational change (Dahl, 2011), becoming an entrepreneur (Dahl, Nielsen, & Mojtabai, 2010), and pay for performance (Dahl & Pierce, 2020) on stress. Dahl and his colleagues have also studied the effects of wives earning more than their husbands on erectile dysfunction, insomnia, and anxiety (Pierce, Dahl, & Nielsen, 2013). These studies all use unique data from Denmark that permit the matching of firm and individual characteristics with prescription information from national registries.