"Some would like to turn the debunking of the fiscal event horizon claim into a cautionary tale about macroeconomic policy advice in general. They would throw up their hands, saying macroeconomic analyses either inherently depend upon too little data to have reliable results, or inevitably will be selectively picked up by ideologues and opportunistic politicians to suit their purposes.
Perhaps both: there will always be some willing economist who can play with the data to provide credible-seeming study to support any given politically influential point of view. This, however, is far too defeatist, if not craven, a conclusion to draw."
Adam Posen – President of the Peterson Institute for International Economics.