Hans F. Sennholz was a prolific author who studied under a theoretical Austrian School economist best known for his work on praxeology, a study of what?
Hans Sennholz: Hans F. Sennholz ( ; ] ; 3 February 1922 – 23 June 2007) was a German-born American Austrian School economist and prolific author who studied under Ludwig von Mises. Ludwig von Mises: Ludwig Heinrich Edler von Mises ( ; ] ; 29 September 1881 – 10 October 1973) was an Austrian-American theoretical Austrian School economist. Ludwig von Mises:  He is best known for his work on praxeology, a study of human choice and action.
human choice and action