This paper proposes an explicit test for determining the significance and the timing of slowdowns in economic growth. We examine a large sample of countries and find that a majority - though not all - exhibit a significant structural break in their postwar growth rates. We find that (a) most...

This paper provides evidence on the unit root hypothesis and long-term growth by allowing for two structural breaks. We reject the unit root hypothesis for three-quarters of the countries – approximately 50% more rejections than in models that allow for only one break. While about half of the...