OSLO, Feb 1: Southern Norway is in the midst of a diaper shortage after a supermarket price war lured enterprising bulk shoppers from eastern Europe who have cleaned out the shelves, customs officials and retailers said. Norway is one of the world’s most expensive countries. However, supermarkets in the south trying to lure local customers by undercutting rivals on the price of “nappies” inadvertently made it profitable enough for residents of nearby countries to start trading in them. (agencies)