Osip Arkadyevich Yermansky (Russian: О́сип Арка́дьевич Ерма́нский; 28 July 1867 – 1941), born Yosif Arkadyevich Kogan (Russian: Иосиф Аркадьевич Коган), and known by the pseudonyms M. Borisov, A. O. Gushka, Meerovich, and P. R., was a Russian Social Democratic political figure, economic theorist, pamphleteer, and memoirist. He was one of the originators of the Soviet school of management, in particular, its psychophysiological tendency. He regarded scientific management as a syncretic, interdisciplinary system, drawing material from other scientific disciplines, such as technology, economics, psychology, and physiology.