The IGU (International Gas Union) Wholesale Gas Price Survey which began in 2005 (LNG Price Formation Mechanism). The survey was launched to assess global wholesale price formation mechanisms and track their evolution. It classifies global wholesale price formation mechanisms into nine distinct categories and quantifies the share of each mechanism in wholesale gas prices across the world:: Oil Price Escalation (OPE); Gas-on-Gas Competition (GOG); Bilateral Monopoly (BIM); Netback from Final Product (NET); Regulation: Cost of Service (RCS); Regulation: Social and Political (RSP); Regulation: Below Cost (RBC); No Price (NP); Not Known (NK) (Source: WHOLESALE GAS PRICE SURVEY 2016 EDITION)