Heinrich Freiherr von Stackelberg (October 31, 1905 – October 12, 1946) was a Nazi economist who contributed to game theory and industrial organization and is known for the Stackelberg leadership model. Stackelberg became a member of the Nazi Party in 1931 and was a Scharführer (Sergeant) in the SS. However, his interactions with many German aristocrats opposed to the Nazi regime (some of whom were within his immediate family), led to his increased disillusionment with that movement to the extent that towards the end of his life he no longer supported it. Biography Stackelberg was born in Moscow into a Baltic German family of nobility from present-day Estonia. His mother was an Argentinian of Spanish descent. After the October Revolution the family fled to Germany, first to Ratibor and later to Cologne. He studied economics and mathematics at the University of Cologne as an undergraduate. He graduated in 1927 with a thesis on the Quasi-rent in Alfred Marshalls work (). He continued his studies as a Ph.D. student in economics under Erwin von Beckerath. He graduated in 1930 with a dissertation on cost theory (), which was published in 1932 in Vienna. In 1934 he finished his habilitation on market structure and equilibrium (). After his habilitation he became a lecturer at the University of Cologne. After one semester he accepted a position at the University of Berlin where he taught until 1941. In 1941, Stackelberg became professor of economics at the University of Bonn. In 1944, Stackelberg left Germany for Spain, where he became a visiting professor at the Complutense University of Madrid. He died of lymphoma in 1946. He is buried in the British Cemetery in Madrid. Stackelberg became a member of the Nazi Party in 1931 and became a Scharführer (Sergeant) in the SS in 1933. However, his interactions with many German aristocrats opposed to the Nazi regime (some of whom were within his immediate family), led to his increased disillusionment with that movement to the extent that towards the end of his life he no longer supported it. Research The Stackelberg leadership model is a model of a duopoly. In a standard Stackelberg duopoly situation there are two firms in a market. The number of firms is restricted to two by assuming barriers to entry. Each firm is taking into account its competitors' decision on the quantity produced. Unlike in the Cournot game firms act sequentially,