How big is the mobile game market anyhow?

In the video, Jon Jordan discusses the different sizes given for the global mobile game market in 2016 from market intelligence companies App Annie, Superdata and Newzoo, and argues why they need to be more transparent in their predictions and estimates. You can read more about the situation here. http://www.pocketgamer.biz/comment-and-opinion/65434/making-market-intelligence-useful/