If machines are indivisible, a vintage capital model must give rise to income inequality. If new machines are always better than old ones and if society cannot provide everyone with a new machine all of the time, inequality will result. I explore this mechanism in detail. If technology resides in machines and if a firm or worker must use just one technology at a time, a variety of machines will be in use, and workers' productivities will differ. This is because not everyone can be given the latest vintage machine all of the time. Inequality thus originates in the limited capacity of the capital goods sector. If machine quality and skill are complements, a worker who is paired with the best machine will acquire more skill, and inequality persists indefinitely. Moreover, if the used equipment market or the process of labor turnover function without frictions, a perfect positive assignment between the quality of labor and of capital can be maintained by a process of continual reassignment. This serves to enhance the degree of equilibrium inequality. Paradoxically, in this type of model, free migration of labor across borders raises cross-country inequality instead of lowering it as it does in some other models.
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number
6416.
Length: Date of creation: Feb 1998 Date of revision: Publication status: published as RECD, Vol. 1, no. 2 (April 1998): 497-530. Handle: RePEc:nbr:nberwo:6416
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Cooley, Thomas F. & Greenwood, Jeremy & Yorukoglu, Mehmet, 1997.
"The replacement problem,"
Journal of Monetary Economics,
Elsevier, vol. 40(3), pages 457-499, December.
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Thomas F. Cooley & Jeremy Greenwood & Mehmet Yorukoglu, 1994.
"The Replacement Problem,"
Working Papers
9408, Centro de Investigacion Economica, ITAM.
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