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The use of mathematics in economics in a broad sense is probably as old as economics itself, but in the beginning, around the last quarter of the nineteenth century, at the time of the advent of the mathematical school led by A. Cournot, and joined later by M.E. Walras, W.S. Jevons, A. Marshall, V. Pareto and F.Y. Edgeworth, only rudimentary ... ................
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