This Capital Ideas event explores the causes of repeated budget projection errors. It will describe how these are affecting policy choices. It will ask whether anything fundamental has changed that might require a rethink of how budgets are prepared. And it will explore the institutional barriers to better outcomes, and the opportunities for reform. Katharine Murphy, political editor at the Guardian, and 15-year veteran of the Canberra press gallery, will discuss the issues with John Daley, CEO of the Grattan Institute, presenting new research from Grattan Institute’s work on budget policy.