NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

NBER Working Papers by Emilie Rovito

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Working Papers

November 2006World Technology Usage Lags
with Diego A. Comin, Bart Hobijn: w12677
We present evidence on the differences in the intensity with which ten major technologies are used in 185 countries across the world. We do so by calculating how many years ago these technologies were used in the U.S. at the same intensity as they are used in the countries in our sample. We denote these time lags as technology usage lags and compare them with lags in real GDP per capita. We find that (i) technology usage lags are large, often comparable to lags in real GDP per capita, (ii) usage lags are highly correlated with lags in per-capita income, and (iii) usage lags are highly correlated across technologies. The productivity differentials between the state of the art technologies that we consider and the ones they replace combined with the usage lags that we document, lead us to in...
January 2006Five Facts You Need to Know About Technology Diffusion
with Diego Comin, Bart Hobijn: w11928
This paper presents a new data set on the diffusion of about 115 technologies in over 150 countries over the last 200 years. We use this comprehensive data set to uncover general patterns of technology diffusion. Our main 5 findings are as follows: (i) Once the intensive margin is measured, technologies do not diffuse in a logistic way. (ii) Within a typical technology, the dispersion in the adoption levels across countries is about 5 times larger than the cross-country dispersion in income per capita. (iii) The rankings of countries by level of technology adoption are very highly correlated across technologies. (iv) Within a typical technology, there has been convergence at an average rate of 4 percent per year. (v) The speed of convergence for technologies developed since 1925 has been t...

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