Real equipment investment in the United States boomed in the 1990s, led by soaring investment in computers. We find that traditional aggregate econometric models completely fail to capture the magnitude of this growth—mainly because these models neglect to address two features that were...

The one-sector Solow-Ramsey model is the most popular model of long-run economic growth. This paper argues that a two-sector approach, in which technological progress in the production of durable goods exceeds that in the rest of the economy, provides a far better picture of the long-run...