In this note, the authors present the outcomes of two unit root tests, which allow for the existence of a break in real GDP for twelve industrial countries, using data for the period 1870-1989. The authors conclude that in the majority of the countries real per capita GDP has no unit root and...

In this paper, the stationarity of aggregate output is examined using the scaled variogram for a sample of twelve countries. It is argued that if the true data generating process of output is stationary around a deterministic trend with a change in mean and/or growth rate, the results of...