LUDWIG VON MISES — was a theoretical Austrian School economist. He is best known for his work on praxeology, a study of human choice and action (known as Carnegie school decision-making model as well). His writings have exerted significant influence on the libertarian movement in the United States.
FRIEDRICH HAYEK — was an Austrian and British economist and political philosopher best known for his defense of classical liberalism. His account of how changing prices communicate information which enables individuals to co-ordinate their plans is widely regarded as an important achievement in economics.