Looking only at standard macroeconomic statistics, you would think the economy was in very good shape. Gross domestic product has grown at a 4.4 percent annual rate in the last six months, well above the historical average. But these statistics are like looking through a rearview mirror. Jason Furman, director of the Hamilton Project at the Brookings Institution and Tax Policy Center contributor, discusses where the US economy is headed in this New York Times op-ed.