Full Title: The Impact of Ethanol and Ethanol Subsidies on Corn Prices: Revisiting History
Author(s): B. Babcock, J. Fabiosa
Publisher(s): Center for Agricultural and Rural Development, Iowa State University
Publication Date: April 1, 2011
Full Text: Download Resource
Description (excerpt):
The rapid rise in corn prices that began in the fall of 2006 coincided with exponential growth in U.S. corn ethanol production. At about the same time, new ethanol consumption mandates were added to existing ethanol import tariffs and price subsidies. This troika of subsidies leads critics to view the ethanol industry as being beholden to subsidies, which then leads to the conclusion that ethanol subsidies lead to high corn prices. But droughts, floods, a severe U.S. recession, and two general commodity price surges have also occurred since 2006. It simply is wrong to assume that none of these factors has influenced corn prices.
While we cannot rerun history to see what corn prices would be like today without ethanol subsidies, we can rewrite history in a computer model to estimate what impact subsidies have had on market prices. The model would first need to be calibrated so that its solution re-creates what actually happened in agricultural markets. Then it would need to be rerun after government incentives to produce and consume corn ethanol are removed from the model’s equations. The resulting prices can then be compared to the historical record to estimate the market impacts of ethanol subsidies. This is exactly what we did for the 2005 to 2009 corn marketing years using the same model of the agricultural sector that CARD research staff used for the Environmental Protection Agency to estimate land-use changes from biofuels. To further isolate the effects of ethanol on commodity prices, we also ran a scenario in which we froze ethanol production at 2004 levels.