From Which Side to the Steady State of the Augmented Solow Model? The Role of Country-Specific Total Factor Productivity Growth Rates
Hugo Hollanders ()
Authors registered in the RePEc Author Service: Thomas Ziesemer ()
No 3, Research Memorandum from Maastricht University, Maastricht Economic Research Institute on Innovation and Technology (MERIT)
The human capital-augmented Solow model (Mankiw et al., 1992) has been criticized by Cho and Graham (1996) by stating that half of all countries converge to their steady state from above, i.e. from income levels above those obtained in their steady state. This is clearly at odds with the general idea that countries approach their steady state from a backward position. In this paper we will argue that this result is primarily due to the assumption of an identical exogenous rate of technological progress for all countries. Once different rates of technological progress are introduced into the model, the number of countries approaching their steady state from above is reduced to a number more in line with what the augmented Solow model would predict. However, for a sample consisting of 98 non-oil countries, the assumption of constant returns to scale has to be rejected. For the non-oil sample our analysis thus both supports and challenges the human capital-augmented Solow model. For a more limited sample consisting of 22 OECD countries, the results clearly support the augmented Solow model by both reducing the number of countries converging from above their steady state to zero and by accepting the assumption of constant returns to scale.
Keywords: mathematical economics and econometrics (search for similar items in EconPapers)
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