Title: A comment to Fratini's “Rent as a share of product and Sraffa’s price equations”
Abstract: Abstract This comment from Fratini's article “Rent as a share of product and Sraffa's price equations” corrects Fratini's demonstration that rent as a share of the product and rate of profits could both increase at the same time. By doing so, this comment underlines the specificity of Sraffa's theory of value, and especially the need to only analyze systems of production where exchanges are needed to reproduce the system.