The Association of National Advertisers (ANA) is seeking to address the “profound disagreement” about non-transparent practices in media buying by inviting senior leaders from the 4A’s (American Association of Advertising Agencies) to meet in October.

In recent weeks, the two industry bodies have been engaged in a war of words concerning the frequency with which media shops pursue practices such as failing to disclose the rebates they receive and marking up resold inventory.

Read the full Warc article here.