French Economy Minister Christine Lagarde has written her counterparts in the top industrial powers urging the Group of Eight countries to call on oil producers to hike production, her office said. "We should urgently reiterate our call on oil producing countries to increase their production levels in order to alleviate tensions in the oil market and better anchor expectations," she wrote her colleagues in the letter, the text of which was released by her office. Noting that crude oil prices have more than doubled since the beginning of 2007, Lagarde suggested the G8 discuss oil prices at a specific session at their next meeting on June 13 and 14 in Osaka, Japan. "I suggest that the agenda of our next meeting be amended to discuss the impact of high oil prices on the world economy and the policy measures we can collectively propose both to limit their detrimental effects in the short term and to promote structural reforms to avoid these effects in the future."