There are doubts that continued pump priming by central banks will yield the level of stimulative effect that is needed and desired. Someone needs to produce the economic equivalent of the Levy equation in pharmacology.The International Monetary Fund once again lowered its forecast for economic growth, both this year and in 2016. Without stronger economic growth, commodities – including agriculture – will continue to struggle for profitability. There are doubts that continued pump priming by central banks (e.g., flooding the market with cheap money) will yield the level of stimulative effect that is needed and desired. Someone needs to produce the economic equivalent of the Levy equation in pharmacology that plots the declining effect of a...