On this week's episode of The MadTech Podcast, ExchangeWire's CEO, Ciaran O'Kane and COO, Rachel Smith are joined by Barry Adams, general manager, BidSwitch, to discuss the latest madtech news and trends.

This week:

- Why Publicis are buying Epsilon
- The IAB Tech Lab's new specs for ad seller transparency; Sellers.json and OpenRTB SupplyChain Object
- Why AT&T has sold its stake in Hulu back to Hulu