Price theory suggests that commodity prices should be stationary series. Yet, tests for unit roots rather frequently imply that these prices are not stationary. This seeming inconsistency is investigated by applying alternative specifications of unit root tests to prices of corn, soybeans,...

Price theory suggests that commodity prices should be stationary series. Yet, tests for unit roots rather frequently imply that these prices are not stationary. This seeming inconsistency is investigated by applying alternative specifications of unit root tests to prices of corn, soybeans,...

This article provides a perspective on major innovations in research on agricultural markets over the past century. We review research on market structure and performance, vertical coordination arrangements, and institutions for producer collective action. Contributions to empirical modeling of...