Abstract: | This study looks at the question of whether soybeans, soybean meal, and soybean oil produced in the United States and exported were part of a single, world geographic market during the decade of the 1980s. An answer to this question is sought using an approach to defining a geographic market based on the notion of instantaneous causality. The empirical results suggest that there was but a single identifiable world market for these commodities over the period of study. |