Wieser also developed a monetary theory. It was inspired by the research of Carl Menger, in particular by his study of currency, which discussed both the historical evolution of money and the theory of its value. Wieser used the theory of marginal utility as a basis for his monetary theory. It was initially rejected; in fact, some authors tried to prove that marginalism necessarily failed when used as a basis for building such theories. However, his disciple Ludwig von Mises studied Wieser's theory and fleshed it out, creating the complex upon which he built the German concept of (money).
