High Quality Content by WIKIPEDIA articles! Oskar Ryszard Lange (July 27, 1904 in Tomaszów Mazowiecki, then Vistula Land October 2, 1965 in London, United Kingdom) was a Polish economist and diplomat. He was most known for advocating the use of market pricing tools in socialist systems and providing the earliest model of market socialism. Lange was born in Tomaszów Mazowiecki in a Jewish family, the son of a textile merchant Arthur Julius Rosner and Sophie Albertine Rosner. He studied law and economics at University of Krakow, where he received a B.A. (1926) and a Masters of Law (Ll.D, 1928). From 1926 to 1927 Lange worked at the Ministry of Labor in Warsaw. This was followed by a research assistantship at the University of Krakow (1927 1931). He married Irene Oderfeld in 1932. In 1934, a Rockefeller fellowship brought him to England, from where he emigrated to the United States in 1937.