Grey differentiated itself from its competitors by using a team approach to advertising that closely worked with its customers and conducted extensive marketing research .
In 1939 , he joined the Grey Advertising Agency ( founded by Lawrence Valenstein and Arthur C. Fatt ) and as an account executive .
Grey Advertising Agency differentiated itself from its competitors by using a team approach to advertising that closely worked with its customers and conducted extensive marketing research .
In 1939 , he joined the Grey Advertising Agency ( founded by Lawrence Valenstein and Arthur C. Fatt ) and as an account executive .