Book excerpt: Known as the "economist's economist" for his work on creating a synthetic economic theory, Swedish economist Knut Wicksell was a controversial, but highly influential figure in modern economic thought. His contributions to marginal productivity theory, income distribution and, most notably, his theory of interest would come to have a profound impact upon twentieth century economic theory, not least in the work of John Maynard Keynes. First published in English in 1934 and 1935, this Routledge Revival set is a reissue of Wicksell's two volume work on political economy, first published in Sweden in 1901 and 1906. This work is aimed at both the professional economist and the advanced student alike, as well as all those interested in the theoretical development of political economy. Volume I concerns itself predominantly with issues of theory: specifically the theory of value, the theory of production and distribution and the theory of capital accumulation. Volume II deals with theories relating to money, currency and credit.