The decline in the service flow from a stock of capital goods with age, due to the physical retirement of capital units and to the gradual loss of efficiency of each unit remaining, can be described by survival curves and efficiency curves. The paper reconsiders the relationship between these...

This study explains the causes of capital controversies that occurred thrice in economic history, namely, at the turn of the 20th century, in the 1930s, and in the 1960s. Recurrence of controversies seeks answers from various theoretical frameworks. Differences between the Classical and...