This article introduces original annual average years of schooling measures for each state from 1840 to 2000. The paper also combines original data on real state per-worker output with existing data to provide a more comprehensive series of real state output per worker from 1840 to 2000. These...

The authors examine the relative importance of the growth of physical and human capital and the growth of total factor productivity (TFP) using newly organized data on 145 countries that span more than one hundred years for twenty-four of these countries. For all countries, only 3 percent of...