The term “mega deal” has been widely used in relation to two large prospective trade deals between the United States and Europe — the Transatlantic Trade and Investment Partnership — and between Asia and the Pacific — the Trans-Pacific Partnership. This paper, authored by Chungding Li, Jing Wang and John Whalley, explores a possible description of mega deals by making an inventory of current deals in place, under discussion or negotiation, and deals yet to be considered.