The data from Eurostat are euro exchange rates (number of national currency per euro). The natural logarithm has been taken of the Denmark-euro exchange rate from Eurostat. The Bulgaria-Denmark exchange rate is calculated as the ratio of the Bulgaria-euro to Denmark-euro exchange rates taken from Eurostat. The natural logarithm is then taken of the derived Bulgaria-Denmark exchange rate. Household textiles prices as well as recreational and sporting services prices for Denmark and the Euro Area are taken from Eurostat. The natural logarithm of the ratio of Danish to Euro Area household textiles prices as well as the natural logarithm of the ratio of Danish to Euro Area recreational and sporting services prices are constructed. Pharmaceutical product prices for Bulgaria and Denmark are take from Eurostat. The natural logarithm of the ratio of Bulgarian to Danish pharmaceutical product prices is constructed from this raw data.