Samuelson, Paul A. - In: The European Journal of the History of Economic Thought 14 (2007) 2, pp. 243-271
Proofs are given that only singularly can real 1750 - 2007 competitive price ratios be 'natural', in the sense of being invariant under changes in demand tastes. Proofs are given that both 1750 - 1870 discrete technologies or 1890 - 2007 continuum technologies, with convexity properties...