Brian Wieser, CFA, is CEO and Principal of Madison and Wall, a strategic consultancy for the media and technology industries. Described in the press as "Madison Avenue's de facto Chief Economist," Brian was previously Global President at WPP's GroupM, the world's largest media services firm. He also worked in a similar capacity at Interpublic's Magna Global, and additionally worked in ad tech for Simulmedia. Brian's Wall Street experience includes time as an Institutional Investor award-winning analyst for the independent firm Pivotal Research and at Deutsche Bank. He started his career at Lehman Brothers as an investment banker.