gold for at least 300 years. Being expected to continue his family business, Frisch became an apprentice in the David Andersen workshop in Oslo. However at his mother's advice, while doing his apprenticeship Frisch also started studying at the Royal Frederick University. His chosen topic was economics, as it seemed to be "the shortest and easiest study" available at the university, and passed his degree in 1919. In 1920 he also passed his handicraftsman tests and became a partner in his father's workshop. Early career and further education In 1921 Frisch received a fellowship from the university which enabled him to spend three years studying economics and mathematics in France and England. After his return to Norway, in 1923, although the family's business was having difficulties, he continued his scientific activity, believing that research, not jewellery, was his real calling. He published a few papers about probability theory, started teaching at the University of Oslo during 1925 and, in 1926, he obtained the Dr. Philos. degree with a thesis in mathematical statistics. Also in 1926, Frisch published an article outlining his view that economics should follow the same path towards theoretical and empirical quantization that other sciences, especially physics, had followed. During the same year, he published his seminal article "Sur un problème d'économie pure" starting the implementation of his own quantization programme. The article offered theoretical axiomatizations which result in a precise specification of both ordinal and cardinal utility, followed by an empirical estimation of the cardinal specification. Frisch also started lecturing a course on production theory, introducing a mathematization of the subject. Frisch received a fellowship from the Rockefeller Foundation to visit the United States in 1927. There, seeking other economists interested in the new mathematical and statistical approaches to economics, he associated with Irving Fisher, Wesley Clair Mitchell, Allyn Young and Henry Schultz. He wrote a paper analyzing the role of investment in explaining economic fluctuations. Wesley Mitchell, who had just written a book on business cycles, popularized Frisch's paper which was introducing new advanced methods. Later career Although his fellowship was extended to travel to Italy and France, the next year Frisch had to return to Norway because of his father's death. He spent one year to modernize and recapitalize his family's workshop by selling family assets and to find a jeweller to manage the business for him. Then he resumed academic work, in 1928 being