Advertising Quality calibration Telemarketing 
Robert Davis
APRIL 5, 2018
Although telemarketing is undergoing a revival, it has had its ups and downs since the beginning. The big surge in telemarketing operations happened in the early 1980s to mid-1990s when the industry grew from employing a half-million agents to 4.5 million, according to the Ad Age Encyclopedia of Advertising.
Robert C. Davis and Associates
APRIL 5, 2018
Although telemarketing is undergoing a revival, it has had its ups and downs since the beginning. The big surge in telemarketing operations happened in the early 1980s to mid-1990s when the industry grew from employing a half-million agents to 4.5 million, according to the Ad Age Encyclopedia of Advertising.
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