Competing interests: Paul Kershaw is the founder of Generation Squeeze, a nonprofit, university–community collaboration located at three institutions: his laboratory at the University of British Columbia, the Vancity Community Foundation (VCF) charity, and the nonprofit Association for Generational Equity (AGE). Kershaw is the unpaid chair of a volunteer advisory group for the VCF, and the unpaid chair of the volunteer board of AGE. Generation Squeeze receives funds to support its community engagement activities from the Vancouver Foundation, United Way of the Lower Mainland, Vancity Credit Union, Friends of the Greenbelt Foundation, Wesgroup and the Urban Development Institute. Commercial interests do not provide any funding for Generation Squeeze research, nor contribute to Paul Kershaw’s salary at his UBC laboratory.