COHN, GUSTAV (184o-1918), German economist, born on Dec. 12, 1840, at Marienwerder, West Prussia, was educated at Berlin and Jena and became professor of political science first at Zurich (1875), and then at Gottingen (1884). He died at Gottingen on Sept. 20, 1918. His principal works are: Untersuchungen fiber die eaglische Eisenbahnpolitik (Leipzig, 1874 75) ; System der Nationalokonomie (Stuttgart, 1885) ; Finanzwissen schaft (1889) ; Nationalokonomische Studien (1886), and Zur Ge schichte and Politik des Verkehrswesens (Igoo).