The first article published by Franco Modigliani has become one of the basic texts of the modern Keynesian economics. It formalized the model (or at least one model) implicit in the General Theory. Modigliani argued that the characteristics Keynesian conclusions are based primarily on the (realistic) rigidity of nominal wages. https://www.diegojavierfares.com/save-now-Early-Columbia-County-best-find/