In the wake of the Association of National Advertisers much-publicized report about agency media-buying practices in the U.S. this summer, marketers seem to finally be waking up to the issue of transparency. Several brands — including J.P. Morgan Chase, General Electric and Sears — are reportedly halting media budgets and conducting outside audits, as reported by Business Insider and the Wall Street Journal.

MasterCard is being a little more coy about its approach. Digiday caught up with Ben Jankowski, MasterCard’s svp of global media, at Advertising Week. Jankowski was part of the ANA Task Force on Transparency and has previously worked on the agency side at Omnicom, WPP and Havas.

Read the full Digiday article here.