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An Exploration of Technology Diffusion

  • Diego Comin
  • Bart Hobiijn

We develop and estimate a model where technology diffusion depends on the level of productivity embodied in capital and where this is, in turn, determined by two key mechanisms: the rate at which the quality embodied in new technology vintages increases (embodiment) and the gains from varieties induced by the introduction of new vintages (variety). In our model, these two effects are related to technology adoption decisions taken at two different levels. The capital goods suppliers%u2019 decisions of when to adopt a given vintage determines the embodiment margin. The workers%u2019 decisions of which of the adopted vintages to use in production determines the variety margin. Estimation of our model for a sample of 19 technologies, 21 countries, and the period 1870-1998 reveals that embodied productivity growth is large for many of the technologies in our sample. On average, increases in the variety of vintages available is a more important source of growth than the increases in the embodiment margin. There is, however, substantial heterogeneity across technologies. Where adoption lags matter, they are largely determined by lack of educational attainment and lack of trade openness.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 12314.

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Date of creation: Jun 2006
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Publication status: published as Diego Comin & Bart Hobijn, 2010. "An Exploration of Technology Diffusion," American Economic Review, American Economic Association, vol. 100(5), pages 2031-59, December.
Handle: RePEc:nbr:nberwo:12314
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