​COHN, GUSTAV (1840–  ), German economist, was born on the 12th of December 1840 at Marienwerder, in West Prussia. He was educated at Berlin and Jena universities. In 1869 he obtained a post at the polytechnic in Riga, and in 1875 was elected a professor at the polytechnic at Zürich. In 1873 he went to England for a period of study, and as a result published his Untersuchungen über die englische Eisenbahnpolitik (Leipzig, 1874–1875). In 1884 he was appointed professor of political science at Göttingen. Cohn’s best-known works are System der Nationalökonomie (Stuttgart, 1885); Finanzwissenschaft (1889); Nationalökonomische Studien (1886), and Zur Geschichte und Politik des Verkehrswesens (1900).