Document Type

Working Paper

Publication Date


Working Paper Number

WP #10008, September 2010


Cointegration is tested between organic and conventional corn and soybean markets in several locations throughout the U.S. using a unique data set. Organic prices are found to behave like jump processes rather than diffusions, and Monte Carlo methods are developed to compute appropriate critical values for such tests. Findings indicate that no long-run relationship exists between organic and conventional prices, implying that price determination for organic corn and soybean is independent from that for the conventional crops. This suggests that organic corn and soybean prices are driven by demand and supply forces idiosyncratic to the organic market. For each crop, cointegrating spatial relationships are found between prices at the main organic markets. However, such relationships are generally weaker than the ones for the corresponding conventional prices, implying that organic markets are more affected by idiosyncratic shocks than conventional markets.

Publication Status

Published as "How related are the prices of organic and conventional corn and soybean?" in Agribusiness, Vol. 30 no. 3 (Summer 2014): 309-330.

JEL Classification

Q11, Q13, Q18

File Format



42 pages

Included in

Economics Commons