The neoclassical investment literature assumes that capital is homogenous, lives forever and has a constant depreciation rate. More recent theories of investment have shown that when there are distinct capital vintages with embodied technologies, depreciation and capital retirement become economic decisions and this raises important problems with existing empirical work. Direct testing of these issues, however, has been rare because of the lack of micro data. This paper uses new data on the service lives of individual capital goods in the airline industry to empirically examine the impact that economic factors have on capital retirement. The results strongly support the view that retirement is fundamentally an economic decision. Retirement is much more likely in recessions, when the cost of capital is low, or when a firm has good financial performance. Factor prices and industry regulation are also important. Since many of these factors also influence capital expenditures, the results imply that estimates from the conventional investment literature such as the effect of the cost of capital or financial performance may substantially overstate the case since their impact on net investment may be much more modest than their impact on gross investment. The results also have implications for the measurement of productivity.
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number
6392.
Length: Date of creation: Feb 1998 Date of revision: Handle: RePEc:nbr:nberwo:6392
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References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
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Other versions:
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Heckman, James J. & Singer, Burton, 1986.
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