This is a striking result, given that the shares of agriculture and food in global GDP and trade are only 3 and 6 per cent, respectively. The contribution of farm and food policies to the welfare cost of global trade-distorting policies for just developing countries is estimated by those authors to be even greater, at 72 per cent -of which more than half is due to policies of developing countries themselves. Even so, the estimates of price distortions that went into that modelling study showed that many developing countries were protecting their less-competitive farmers from import competition, so some of that subset of farmers might be hurt if all markets were opened (Anderson, 2009). The latter trend for developing countries is mainly because of the phasing out of agricultural export taxes, since assistance via import restrictions has risen over the period shown.