The C. E. Hooper Company was an American company which measured radio and television ratings during the "Golden Age" of radio. Founded in 1935, the company provided information on the most popular radio shows of the era. This information was valuable to the radio networks NBC, CBS, ABC and Mutual Broadcasting System, as it would allow them to charge advertisers more for a popular series than a less popular series.Claude E. Hooper became well known for his radio audience measurement systems, Hooper Ratings. Claude E. Hooper worked within the market research organization of Daniel Starch until 1934. He ventured off with a colleague, Montgomery Clark, to start their own research company that first came to be known as Clark-Hooper. By the fall of 1935, Clark-Hooper had already launched syndicated radio measurement services in 16 cities, which they credit this success partially to Dr. George Gallup (see Gallup Poll). Hooper ratings were acknowledged by President Roosevelt as the major rating system within industry standards, which allowed them to participate in radio audience measurements for the President’s radio addresses. Clark-Hooper later became the Claude E. Hooper Company after the duo split in 1938. Although Montgomery Clark took the rights to the company’s print research business, Hooper prospered by forming his own radio audience measurement company (C.E. Hooper Company).Starting in 1948, as the radio networks began venturing into television, Hooper began measuring TV ratings as well. In February 1950, though, the company was bought by competitor A.C. Nielsen. The company is barely remembered today, but during the late 1940s "How's your Hooper?", a reference to how large a series' audience was, was a familiar catchphrase.[citation needed]