Ragnar Frisch (1895-1973) received the first Nobel Memorial Prize in Economic Science together with Jan Tinbergen in 1969 for having played an important role in ensuring that mathematical techniques figure prominently in modern economic analysis. This collection explores his contributions to econometrics and other key fields in the discipline, as well as the results of new research. Contributors include eminent scholars from Europe, the United Kingdom and North America who investigate themes in utility measurement, production theory, microeconomic policy, econometrics methods, macrodynamics, and macroeconomic planning.