Many people point to information and communications technology (ICT) as the key for understanding the acceleration in productivity in the United States since the mid-1990s. Stories of ICT as a 'general purpose technology' suggest that measured TFP should rise in ICT-using sectors (reflecting...

Using cross-country data, we review the empirical evidence concerning long-term labor and total factor productivity growth. We find that the conclusions one can draw from cross-country data are surprisingly modest. Nevertheless, we confirm the crucial role for physical capital accumulation in...

We examine how the economy responds to both disembodied and embodied technology shocks in a model with vintage capital. We focus on what happens when there is a change in the number of vintages of capital that are in use at any one time and on what happens when there is a change in the...