Pantaleoni, Maffeo mäf-fĕ´ō päntälāô´nē [key], 1857–1924, Italian economist and politician. He was finance minister in Gabriele D'Annunzio's government at Fiume (1919), one of the first senators named by Benito Mussolini, and a delegate (1923) to the League of Nations. In Pure Economics (1889, tr. 1898, repr. 1957), Pantaleoni made a distinguished contribution to the theory of marginal utility. He also did notable work in statistics and finance.
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