Measurement of capacity depreciation based on engineering data
1977
Penson, J.B. Jr | Hughes, D.W. | Nelson, G.L.
The widely used estimates of annual capacity depreciation for selected types of farm producer capital published by the USDA rest on the assumption that the amount of capital consumed annually equals a constant fraction of the existing capital stocks. this study demonstrates, through the use of agricultural engineering data, that the productive capacity of farm tractors deteriorates in a concave rather than the convex pattern suggested by present USDA estimates. the implications for studies estimating aggregate production functions based on factor shares or farm investment demand equations are discussed. finally, recommendations for change to selected sector economic accounts are made.
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