This is the online appendix to the working paper "The GATT/WTO welfare effects: 1950–2015" available at: https://ink.library.smu.edu.sg/soe_research/1957/
I suggest a novel theory of GATT/WTO negotiations based on the Krugman (1980) "new trade" model. It emphasizes international production relocations and is easy to calibrate to bilateral trade data. Fo
