This paper examines quality-price relationship in U.S. soybean exports. Implicit prices for quality characteristics of U.S. soybean exports were estimated using a hedonic price function from a rich transaction-specific data set to major destination markets to test the efficiency of the market in transmitting preferences for quality. The results of this analysis suggest that the price of soybean export shipments was not affected by the oil and protein content of the soybeans. Moisture content was surprisingly found to positively affect price while foreign material reduced price after the 1989-1990 marketing year. These results are discussed for their implications for existing, and proposed changes to existing, soybean market regulation.