The Panel Study of Income Dynamics (PSID) is a longitudinal study since 1968 of a representative sample of U.S. individuals and the family units in which they reside. The study?s long-term span, innovative genealogical design, and comprehensive content have been critical to the fundamental understanding of a wide variety of key social science issues, including those involving life course effects. The main goal of this supplement to collect a portion of the approximately 3 ? minutes of content on volunteering from approximately 9,150 PSID families during wave 37 (2011), process, and disseminate the data within PSID?s publicly accessible data center (www.psidonline.org). This work will be co-funded through support received by other sponsors including the Templeton Foundation.