Market integration in US gasoline markets

This paper analyses the degree of market integration in the retail gasoline markets in the United States after it was completely deregulated in 1981. The monthly average prices of unleaded regular gasoline, excluding taxes, from January 1983 to December of 1998 for five US Petroleum Administration Defense Districts were considered in the analysis. There is evidence of a high degree of market integration in the gasoline markets as evidenced by the Engel and Granger and Johansen cointegration tests, but perfect market integration is rejected in all but a few cases.     

Exchange rate pass-through,price discrimination,and US meat export prices

Exports are becoming increasingly important for US livestock and poultry producers. Consequently, meat industry participants are concerned about the potential impacts of variations in relative currency values. These effects are considered by quantifying the impacts of relative exchange rates on US beef, pork and poultry export prices. In addition, the impacts of GATT and NAFTA agreements on exchange rate pass-through are considered. The results indicate incomplete exchange rate pass-through occurs for several countries. Trade liberalization under GATT has positively influenced US beef and poultry export prices.     

Regional obesity determinants in the United States: a model of myopic addictive behavior in food consumption

Obesity is considered one of the largest public health problems in the United States today. The premise for our study is a body of results from medical research showing that sweetened foods, i.e., an increased consumption of sugars, leads first to sugar addiction and second to carbohydrate addiction and increased consumption of fats. The latter feature is actually responsible for the increase in body mass index (BMI), but the trigger that produces cravings for extra calories is sugar and sweeteners. Based on our results, a myopic model of addictive behavior in food consumption seems to capture the food consuming habits and related outbreak of obesity among the American population. Our results indicate that lower current and past real prices of sugar contribute significantly to higher values of BMI, and increase the likelihood of becoming obese in the United States.     

Futures markets and price stabilisation: An analysis of soybeans markets in North America

The objective of this paper was to determine whether the futures markets have a stabilising or destabilising impact on soybean's spot prices in North America. Directed acyclic graphs (DAGs) are used to test for causality between futures prices, spot prices and ending stocks, followed by time series econometric analysis. The DAGs point to the two-way causal link between futures and spot prices and a lack of a causal link between inventory/stocks and spot price volatility. Time series results, including cointegration, vector error correction, impulse response and variance decomposition analysis, indicate a large impact from futures markets on the level and volatility of soybean spot prices in both the short and long run. These results have potentially important implications, as the impact of commodity price volatility is typically asymmetric across different actors. Farmers, for example, unlike speculators, utilise price risk management (PRM) instruments such as futures markets to mitigate price risks and appear to suffer from intensified volatility precisely because of their use of these instruments. Therefore, additional policies to cope with commodity price volatility, such as direct price controls or mitigation of consequences, can have critical stabilising functions supporting farmers' welfare and regional (rural) development.     

Linkages between natural gas,fertiliser and cereal prices: A note

We use structural vector autoregressions to analyse the dynamic effects of shocks to natural gas and nitrogenous fertiliser prices on three major cereal crops: maize, rice and wheat. We find that the response of cereal prices to natural gas and fertiliser price shocks has been relatively small, instantaneous and transitory. These findings suggest that crop prices may change rapidly in response to energy and fertiliser prices, even when there are no shifts in the underlying fundamentals in crop markets. Furthermore, because the effects of the shocks dissipate rather quickly, short-term measures to address swings in food prices may suffice.