(Harpers) - A new era of tight global wine supplies will weaken the age-old divide between New World and Old World, according to a PricewaterhouseCoopers retail analyst. Supermarkets' need to put wine on shelves at the best possible price will require them to become more flexible on provenance, according to Christine Cross, chief retail adviser at PricewaterhouseCoopers. "The sector will start to forget the New World versus Old World debate," she told Harpers on the sidelines of a PWC round table discussion on commodity price volatility in the food and drink supply chain.