Kroner, Kenneth F.; Kneafsey, Devin P.; Claessens, Stijn; … - Economics Research, World Bank Group - 1993
Commodity prices have historically been among the most volatile of international prices. Measured volatility (the standard deviation of price changes) has not been below 15 percent and at times has been more than 50 percent. Often the volatility of commodity prices has exceeded that of exchange...