For more information on how depreciation is measured in NIPA, see Arnold Katz and Shelby Herman, Improved Estimates of Fixed Reproducible Tangible Wealth, 1929-95, Survey of Current Business, Bureau of Economic Analysis   
Many have stated that NIPA's take on depreciation is in need up updating.
mnli hypothesis: Many have stated that NIPA's take on depreciation is in need up updating. premise: For more information on how depreciation is measured in NIPA, see Arnold Katz and Shelby Herman, Improved Estimates of Fixed Reproducible Tangible Wealth, 1929-95, Survey of Current Business, Bureau of Economic Analysis   