What to expect of the euro? Analysing price differences of individual products in Luxembourg and its surrounding regions

This paper uses individual supermarket prices and analyses to what extent absolute deviations from the law of one price are attributable to transaction costs. The results indicate that absolute percentage price differences are increasing in distance, but at a decreasing rate. Similarly, crossing borders increases price deviations, while being inside the former Belgian-Luxembourg monetary association has the opposite effect. This result nurtures the hopes that the euro may be able to reduce regional and cross-border price differences in the long term. Furthermore, larger differences in packaging sizes result in larger price deviations, while the opposite is the case for prices observed within the same retail group.