Mr HOCKEY (North Sydney) (14:44): My question is to the Treasurer. I refer the Treasurer to the statement today in Senate estimates by climate change departmental officials that Treasury had ignored market prices for market traded carbon tax revenue forecasts and instead chose a straight-line method that shows revenue going up and up and up even though the market is going down and down and down. Given that the government has used market prices for commodities and currencies and so on, Treasurer, where has this novel new straight-line methodology come from and can you name the economists that support it? (Time expired)