A prototypical vintage capital model of economic growth is developed,
where the decision to replace old technologies with new ones is modele
d explicitly. Technological change is investment specific. Depreciatio
n in this environment is an economic, not a physical, concept. The vin
tage capital economy's balanced-growth paths and transitional dynamics
are analyzed, The transitional dynamics are markedly different from t
he standard neoclassical growth model. (C) 1997 Elsevier Science B.V.
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