Affluence, improved transportation and changes in mass contacts course the 1980s affected the growth of extremely large ad agencies with branch offices around the world. In 1982 and '83, such as, eight sizable agencies were purchased by larger ones. By the end of the decade, agencies once considered secure were also changing hands. Furthermore cable TV had a profound impact in reorganization the TV industry during the decade. As cable channels prospered, they undermined the influence of traditional broadcast networks. in 1980s were featured by serious criticism and challenges for the advertising industry. For example, long-held assumptions about advertising efficacy were challenged by Gerard Tellis, who put together a advanced statistical model