<prompt> Translate the following text to EnglishLakini ukitazama fasihi ya kimataifa ya fedha wakati Mundell alikuwa katika siku zake za utukufu, unapata hisia kwamba alikuwa miaka 15 au 20 mbele ya wenzake.  <response>: But if you look at the international monetary literature when Mundell was in his glory days, you get the impression that he was 15 or 20 years ahead of his contemporaries. 