 In 2009, Pratte co-founded The Federal Idea, a Quebec-based, non-partisan think tank focused on federalism, and served as chair of its board of directors until 2014.Pratte's father, Yves Pratte (1925–1988), was a lawyer, chairperson of Air Canada (1968–1975), justice on the Supreme Court of Canada (1977–1979) and director of Power Corporation and Power Financial.His brother, Guy Pratte, is a partner at Borden Ladner Gervais.