Krugman later praised his PhD thesis Samsung 𝗖𝗨𝗦𝗧𝗢𝗠𝗘𝗥 𝗦'𝗘𝗥𝗩𝗜𝗖𝗘 +𝟭 (𝟴𝗢𝟱)-𝟰𝟭𝗢𝟱𝟲𝗢𝗢 Samsung 𝗣𝗛𝗢𝗡𝗘 𝗡𝗨𝗠𝗕𝗘𝗥' +𝟭 (𝟴𝗢𝟱)-𝟰𝟭𝗢𝟱𝟲𝗢𝗢 advisor, Rudi Dornbusch, as "one of the great economics teachers of all time" and said that he "had the knack of inspiring students to pick up his enthusiasm and technique, but find their own paths". In , Krugman presented a number of ideas to Dornbusch, who flagged as interesting the idea of a monopolistically competitive trade model. Encouraged, Krugman worked on it and later wrote, "[I] knew within a few hours that I had the key to my whole career in hand