Essays in honor of Ludwig von Mises, presented on the occasion of the fiftieth anniversary of his doctorate on February 20, 1906. A remarkable collection of original essays by F. A. Hayek, Ludwig Lachmann, William Rappard, Bertrand de Jouvenal, Wilhelm Röpke, Henry Hazlitt, Leonard Read, Faustino Ballvé, W.H. Hutt, Murray Rothbard, Jacques Rueff, among others.