Nicholas Johannsen
| Nicholas August Ludwig Jacob Johansen | |
|---|---|
| Born | 1844 Berlin | 
| Died | 1928 (aged 83–84) Staten Island, New York City | 
| Nationality | German-American | 
| Academic work | |
| Discipline | Monetary economics | 
Nicholas August Ludwig Jacob Johansen (1844–1928) was a German-American amateur economist, today best known for his influence on and citation by John Maynard Keynes. He wrote under two pen names: A. Merwin and J. J. O. Lahn.