South-South trade is growing fast, but barriers among developing countries are still up to seven times higher than those imposed by the developed world, a representative from the Organisation for Economic Cooperation and Development (OECD) said. Speaking at a Frontier Advisory seminar at the JSE, OECD Development Centre director Mario Pezzini said that South-South trade had experienced tremendous growth in recent years, with exports from developing countries now constituting 37 per cent of global trade, of which about 50 per cent related to South-South trade.