This study explains the development of Business Week from its beginning in 1929 to 1975 and its changes over this forty-five-year period in format, content and editors. The study shows how Business Week developed, reflecting the history of American business, industry, labor, and the rise of the consumer, and recorded the growth and changes in the magazine's format, news departments, services and features, and staff. The study traces the development of Business Week in three periods, 1929, 1930-1950, and 1955-1975; and concludes that Business Week is the leading magazine publication in the business press. The sources of data for this study primarily include the executives of Business Week and the magazine itself.