Supplemental_Material – Supplemental material for Introduction to the Special Collection on the Fragile Families Challenge SalganikMatthew J. LundbergIan KindelAlexander T. McLanahanSara 2019 <p>Supplemental material, Supplemental_Material for Introduction to the Special Collection on the Fragile Families Challenge by Matthew J. Salganik, Ian Lundberg, Alexander T. Kindel and Sara McLanahan in Socius</p>