Abstract

http://ssrn.com/abstract=1932247
 


 



The Food Crises: A Quantitative Model of Food Prices Including Speculators and Ethanol Conversion


Marco Lagi


New England Complex Systems Institute

Yavni Bar-Yam


New England Complex Systems Institute

Karla Z. Bertrand


New England Complex Systems Institute

Yaneer Bar-Yam


New England Complex Systems Institute

September 22, 2011


Abstract:     
Recent increases in basic food prices are severely impacting vulnerable populations worldwide. Proposed causes such as shortages of grain due to adverse weather, increasing meat consumption in China and India, conversion of corn to ethanol in the US, and investor speculation on commodity markets lead to widely diring implications for policy. A lack of clarity about which factors are responsible reinforces policy inaction. Here, for the first time, we construct a dynamic model that quantitatively agrees with food prices. The results show that the dominant causes of price increases are investor speculation and ethanol conversion. Models that just treat supply and demand are not consistent with the actual price dynamics. The two sharp peaks in 2007/2008 and 2010/2011 are specifically due to investor speculation, while an underlying trend is due to increasing demand from ethanol conversion. The model includes investor trend-following as well as shifting between commodities, equities and bonds to take advantage of increased expected returns. Claims that speculators cannot influence grain prices are shown to be invalid by direct analysis of price setting practices of granaries. Both causes of price increase, speculative investment and ethanol conversion, are promoted by recent regulatory changes - deregulation of the commodity markets, and policies promoting the conversion of corn to ethanol. Rapid action is needed to reduce the impacts of the price increases on global hunger.

Number of Pages in PDF File: 56

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Date posted: September 23, 2011  

Suggested Citation

Lagi, Marco and Bar-Yam, Yavni and Bertrand, Karla Z. and Bar-Yam, Yaneer, The Food Crises: A Quantitative Model of Food Prices Including Speculators and Ethanol Conversion (September 22, 2011). Available at SSRN: http://ssrn.com/abstract=1932247 or http://dx.doi.org/10.2139/ssrn.1932247

Contact Information

Marco Lagi (Contact Author)
New England Complex Systems Institute ( email )
24 Mt. Auburn St.
Cambridge, MA 02138
United States
Yavni Bar-Yam
New England Complex Systems Institute ( email )
24 Mt. Auburn St.
Cambridge, MA 02138
United States
Karla Z. Bertrand
New England Complex Systems Institute ( email )
24 Mt. Auburn St.
Cambridge, MA 02138
United States
Yaneer Bar-Yam
New England Complex Systems Institute ( email )
24 Mt. Auburn St.
Cambridge, MA 02138
United States
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