Arthur C. Nielsen Jr., the man who turned the A.C. Nielsen Company into a global leader in market research and television ratings, has died at the age of 92. Nielsen's father founded the company in 1923 and was known for spearheading much of the innovation behind it, but it was the younger Nielsen who led the firm to prominence, after joining in 1945 and taking over as president in 1957. In 1948, he convinced the fir
