First issue of Advertising Age – 1930
1920s G.D. Crain and his friend and colleague Keith J. Evans establish the National Industrial Advertisers Association (NIAA), now The Association of Industrial Advertisers.
1921 The spinoff of Class, Crain’s Market Data Book and Directory of Class, Trade and Technical Publications, is published and begins the tradition of Crain publishing directories.
1930 G.D. Crain launches Advertising Age in Chicago less than two months after “Black Tuesday”.
1950s Crain moves his publications company to 200 E. Illinois Street and opens offices in New York and Washington, D.C. With both of their sons now in school, Gertrude Crain begins to have a larger role in the company.