Saltari, Enrico and Federici, Daniela (2013): Elasticity of substitution and technical progress: Is there a misspecification problem?
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Abstract
In Saltari et al. (2012, 2013) we estimated a dynamic model of the Italian economy. The main result of those papers is that the weakness of the Italian economy in the last two decades is due to the total factor productivity slowdown. In those models the information and communication technology (ICT) capital stock plays a key role in boosting the efficiency of the traditional capital, and hence of the whole economy. The other key parameter to explain the Italian productivity decline is the elasticity of substitution. Recent literature provides estimates of the elasticity of substitution well below 1  thus rejecting the traditional CobbDouglas production function  though there is no particular value on which consensus converges. In our opinion, however, these estimates are affected by a theoretical specification problem. More generally, the technological parameters are long run in nature but the estimates are based on shortrun data. Our aim is to look more deeply into the estimation procedure of the technological parameters. The standard estimation results present a common feature, a combination of a high Rsquared and serially correlated residuals, pointing towards a spurious regression bias. In our opinion this bias is generated by a misspecification issue: the standard estimation approach is static in nature since do not incorporate frictions and rigidities. Our modelling strategy takes into account, though implicitly, adjustment costs without leaving out the optimization hypothesis. Although we cannot in general say that this framework gets rid of the serial correlation problem, the statistics for our model do show that residuals are not serially correlated.
Item Type:  MPRA Paper 

Original Title:  Elasticity of substitution and technical progress: Is there a misspecification problem? 
English Title:  Elasticity of substitution and technical progress: Is there a misspecification problem? 
Language:  English 
Keywords:  Keywords: CES production function; Elasticity of substitution; Income distribution; Factoraugmenting technical progress and ICT technical change. 
Subjects:  C  Mathematical and Quantitative Methods > C3  Multiple or Simultaneous Equation Models ; Multiple Variables > C30  General E  Macroeconomics and Monetary Economics > E2  Consumption, Saving, Production, Investment, Labor Markets, and Informal Economy > E22  Investment ; Capital ; Intangible Capital ; Capacity E  Macroeconomics and Monetary Economics > E2  Consumption, Saving, Production, Investment, Labor Markets, and Informal Economy > E23  Production O  Economic Development, Innovation, Technological Change, and Growth > O3  Innovation ; Research and Development ; Technological Change ; Intellectual Property Rights > O33  Technological Change: Choices and Consequences ; Diffusion Processes 
Item ID:  54474 
Depositing User:  Prof. Enrico Saltari 
Date Deposited:  16. Mar 2014 11:31 
Last Modified:  16. Mar 2014 11:58 
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URI:  https://mpra.ub.unimuenchen.de/id/eprint/54474 
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