KARL HEINRICH RAU (1792-1870), German political economist, was born at Erlangen on the 29th of November 1792. He studied from 1808 to 1812 at the university there, where he afterwards remained as a Privatdozent. In 1814 he obtained the prize offered by the academy of Gottingen for the best treatment of the question how the disadvantages arising from. the abolition of trade gilds might be removed. His memoir, greatly enlarged, was published in 1816 under the title Ober das Zunftwesen and die Folgen seiner Aufhebung. In the same year appeared his Primae lineae historiae politices. In 1818 he became professor at Erlangen. In 1822 he was called to the chair of political economy at Heidelberg where the rest of his life was spent, in the main, in teaching and research. He took some part, however, in public affairs: in 1837 he was nominated a member of the first chamber of the duchy of Baden, and in 1851 he was one of the commissioners sent to England on the part of the Zollverein to study the Industrial Exhibition. A result of this mission was his account of the agricultural implements exhibited at London (Die landwirthschaftlichen Gerd the der Londoner Ausstellung, 1853). He was elected a corresponding member of the French Institute in 1856. He died at Heidelberg on the 18th of March 1870.
His principal work is the Lehrbuch der politischen Okonomie (1826-37), an encyclopaedia of the economic knowledge of his time, written with a special view to the guidance of practical men. The three volumes are respectively occupied with (1) political economy, properly so called, or the theory of wealth, (2) administrative science (Volkswirthschaftspolitik) and (3) finance. The two last he recognizes as admitting of variations in accordance with the special circumstances of different countries, whilst the first is more akin to the exact sciences, and is in many respects capable of being treated, or at least illustrated, mathematically. This threefold division marks his close relation to the older German cameralistic writers, with whose works he was familiarly acquainted. It is a consequence in part of his conformity to their method and his attention to administrative applications that his treatise was found peculiarly adapted for the use of the official class, and long maintained its position as their special text-book. He was the economic teacher, says Roscher, of the well-governed middle states of Germany from 1815 to 1848. The book has passed through many editions; in that of 1870 by Adolf Wagner it was transformed into a new book.
In the earlier part of his scientific life Rau tended strongly towards the relative point of view and an historical method in economics, but he never actually joined the historical school. To the end he occupied a somewhat indeterminate position with respect to that school; on the whole, however, he more and more subordinated historical investigation to immediate practical interests, and in his economic politics moved in the direction of limiting rather than extending the sphere of state action. His general merits are thoroughness of treatment, accuracy of statement, and balance of judgment; he shows much industry in the collection and skill in the utilization of statistical facts; and his exposition is orderly and clear.
Besides the publications already mentioned, he was author of the following: - Ansichten der Volkswirthschaft, 1821; Malthus und Say fiber die Ursachen der jetzigen Handelsstockung, 1821; Grundriss der Kameralwissenschaft oder Wirthschaftslehre, 1823; Uber die Kameralwissenschaft, Entwickelung ihres Wesens und ihrer Theile, 1825; fiber die Landwirthschaft der Rheinpfalz, 1830; and Geschichte des Pfluges, 1845.
Rau founded in 1834 the Archiv der politischen Okonomie und Polizeiwissenschaft, in which he wrote a number of articles, afterwards issued in separate form: amongst them may be named those on the debt of Baden, on the accession of Baden to the Zollverein, on the crisis of the Zollverein in the summer of 1852, on the American banks, on the English poor law, on List's national system of political economy and on the minimum size of a peasant property.
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