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This article aims to rediscover a relatively unknown author to the general public, Slavcho Zagorov, and to revive his ideas. Zagorov was a Bulgarian economist and statistician whose main works date back to 1954 and are mainly devoted to the concept of energy flows in the economy and human metabolism explained through the prism of thermodynamics. His work and career are reminiscent of another Balkan economist, Nicholas Georgescu-Roegen. We first present Zagorov's theoretical work on the importance of energy in economic activity and secondly on the measurement of national income and productivity through energy. Thirdly, we show the relation he establishes between energy and utility. Finally, we discuss his texts in relation to his professional and personal trajectory and point out some preliminary elements of comparison with Georgescu-Roegen's work. [ABSTRACT FROM AUTHOR]

This paper focuses on Soviet practices and debates on money during the 1918–1921 period. In the first part, we briefly present the Bolshevik policy and discussions on eliminating money as a means of payments and calculation. In the second part, we outline in details A. Chayanov's model of in-kind accounting by making some comparisons with O. Neurath's proposals for an economy in kind. The latter had a decisive influence on Soviet Russia. Finally, we conclude with some reflections on the role of these models for ecological economics, modern efficiency measuring and monetary theory. [ABSTRACT FROM AUTHOR]