The Efficiency of Private E-Money-Like Systems: The U.S. Experience with National Bank Notes Staff Working Paper 2015-3 Warren E. Weber Beginning in 1864, in the United States notes of national banks were the predominant medium of exchange. Each national bank issued its own notes. E-money shares many of the characteristics of these bank notes. Content Type(s): Staff research, Staff working papers Topic(s): Bank notes, Digital currencies and fintech, Financial services JEL Code(s): E, E4, E41, E42, E5, E58