Real Convergence in Some OECD Countries

Abstract

The purpose of this letter is to re-examine the convergence hypothesis for 21 OECD countries during the period of 1950-2008. Our nonlinear unit root procedures are able to reject the existence of a unit root in both the de-meaned output and the output gap series from USA series for 21 OECD countries, wheraes the linear ADF test fails to do so, providing some supportive evidence of nonlinear convergence in the outputs.