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Whewell, in his 1829 and 1831 papers gave mathematical formulae for
the elasticity of demand, Gregory King gave an estimate in 1696 regarding
wheat prices, and Lauderdale also wrote about elasticity in 1804. Cournot
also wrote about it in 1838, as did Dupuit and de Quincy in 1844. It was
named by R.S. Moffatt in 1878 in his book Economy of Consumption . All the
above comes from D.H. Macgregor's seminal essay "Marshall and his Book",
Economica, Nov. 1942, pp. 314-315.
Warren Young
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