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,...

Published continuously since 1972, Agricultural Product Prices has become the standard textbook and reference work for students in agricultural and applied economics, buyers and sellers of commodities, and policymakers, clearly explaining conceptual and empirical models applicable to...