...bet.
The ecologist Paul Ehrlich of Stanford University claimed that the price of minerals would go up because of shortages, and the economist Julian Simon of Princeton University offered to sell him $200 1990 futures on five minerals of Ehrlich's choice. In 1990 Ehrlich had to pay Simon almost $600, because the prices had gone down.
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John McCarthy
Thu Aug 21 09:12:21 PDT 1997