Capital formation plays a large part in any evaluation of economic growth and decline. In recent years the provision of capital in the British industrial revolution has received renewed attention. This interest arises out of attempts to trace the course and explain the progress of the pioneer...

This paper argues that all historical data series should be accompanied by formal estimates of their margins of error. We discuss the nature of errors in data series and review earlier attempts to assess their reliability. We show how overall margins of error may be calculated for historical...