Mr SHORTEN (Maribyrnong—Leader of the Opposition) (14:09): My question is to the Prime Minister. Today, the former Prime Minister has shirt-fronted the current Prime Minister over his lack of economic leadership. Will the current Prime Minister take up the former Prime Minister's challenge and rule out retrospective changes to negative gearing? Government members interjecting— Mr Ewen Jones interjecting— The SPEAKER: The member for Herbert! The Treasurer will just wait a second. Members on both sides will cease interjecting. Mr Fitzgibbon interjecting— Mr Perrett interjecting— The SPEAKER: The member for Hunter will cease interjecting. I asked the member for Herbert to cease interjecting a second ago. Mr Hunt interjecting— The SPEAKER: The member for Flinders will not interject while I am addressing the House. I again invite him to familiarise himself with some rulings I made while he was away. The member for Moreton and the member for Herbert are warned.