pThe plunge from $148 a barrel to $50 a barrel in less than five months has opened huge fissures in the Organization of Petroleum Exporting Countries. Some members, such as Iran and Venezuela, are desperate to raise oil prices so they can balance their national accounts. More-conservative members, such as Saudi Arabia, can balance their budgets even at current prices and have room to fear they will be the scapegoats if the global recession deepens./p