Income measurement Concepts Economic Income and permanent Income s million 0 TTTT「T「下 TT「1 13579111315171921232527293133353739414345474951 Years ermanent Income Economic IncomeEconomic Income and Permanent Income Income Measurement Concepts 0 1 2 3 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 Years $ Million Permanent Income Economic Income