Climate indicates commodities, prices

Other Climate Indicators Commodities, Prices. Wages... 

We analyze here two kinds of records indicative of climate change, the yearly record of wheat prices in four European countries since 1200 A.D., and the yield of blue crab in the Chesapeake Bay since 1920, as examples of mathematical treatments that could be used on other temporal records of commodities derivable from archives. 

Economists agree that there exists a definite relation between the market price of a commodity such as wheat and the quantity available [70]. Thus the price of wheat, in historic times of plenty and in times of short supply, should be an indicator of abundance in good climate and of shortage in bad climate, and therefore an indicator of climatic changes. 

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