 When the war ended, he rebuilt Publicis from scratch, introducing the first opinion polls in France and developing the then-American fields of consumer research and brand analysis.He retained his Resistance name of Blanchet, adding it legally to his original name.After the war, Mr. Bleustein-Blanchet reopened Publicis and, calling them on the phone himself, rapidly regained old and new clients, notably Shell, Colgate-Palmolive, L'oreal, Renault, Dim and many others.