Discussion: Exchange Rates, Energy Policy and Outcomes in Agricultural Markets
Rosson, C. Parr, Journal of Agricultural and Applied Economics
These three invited papers examine the role that exchange rates may have in influencing commodity prices, input prices and farm income. The papers arguably represent one of the most important recent attempts to quantify and explain these new linkages. As U.S. and world agriculture moves from a period of high output prices to a period of lower prices, understanding the impact of macroeconomic variables on farm input costs and farm income will become more important. Further, it will be equally important for policy makers to undertake appropriate market interventions in order to have maximum effectiveness should this period of cost-price-squeeze continue to intensify. Each of the papers has something significant to contribute to the understanding and debate of these new linkages between agriculture, the macroeconomic environment, and the energy sector.
Key Words: energy, exchange rates, macropolicy, markets, trade
JEL Classifications: F42
The relationship between high oil prices and the declining value of the U.S. dollar has been cited as one the primary reasons for the rising farm prices and higher input costs that have affected the farm sector during the last several years. The first invited paper on the relationship between oil, exchange rates, and commodity prices attempts to examine these relationships using cointegration. The authors succeed in this endeavor for corn, cotton and soybeans, but not for wheat. Exchange rates were found to be the crucial linkage among prices of oil and corn, soybeans and cotton. This new linkage between prices, oil and exchange rates began between 2004 and 2006, as oil prices were rising and ethanol and alternative energy were taking on added importance to agricultural producers. It may also indicate that as the constraints on corn use in the Renewable Fuel Standards in the 2007 Energy Bill become more binding, this new linkage between corn and oil will weaken, leading to less upward pressure on corn prices and to less market volatility.
The declining value of the U.S. dollar was found to have significant positive impacts on agricultural commodity prices. For oil, however, the relationship was less important, with the results suggesting that oil prices influence the value of the U.S. dollar, but the dollar has no significant effect on the price of oil. While this is counter to much of what has been written in the popular press, it does have strong empirical support. It also raises questions about the most effective tools for policy intervention. Alternative energy policy is largely focused on increasing the supply of biofuels. Should these efforts prove ineffective, it appears that macroeconomic policy will also have little influence on oil prices, at least through the exchange rate linkage.
An alternative view, however, is worth mention. It was reported last year that when the change in oil prices was measured in U.S. dollars compared with other currencies, there appeared to be a major divergence (Washington Post, March 7, 2008). From March 2007 through April 2008, the price of oil in U.S. dollars increased 76%, compared with 47% in Canadian dollars. When oil was valued in euros, the increase was 50% and when oil was valued in Japanese yen, the price increase was 55%. While anecdotal, these data do suggest that the weakening U.S. dollar may lead to higher oil prices for U.S. producers, businesses, and consumers. If this is the case, the U.S. economy may experience a disproportionate share of the oil price burden, leading to more pronounced impacts on cost structure and markets. …