Interpreting cross-section and time-series tests of convergence: the case of labor productivity in manufacturing

This paper investigates whether a disaggregated measure, labor productivity in manufacturing, is converging across eight OECD countries during the period 1950–1998 using both cross-section and time series tests of convergence. The evidence indicates convergence using either test for the full sample, but tests over subperiods suggest that the dynamics of the underlying series change from economies in transition in the early years to economies in balanced, but parallel, growth paths in the later period. The results confirm that the appropriate test for convergence depends on the underlying structure of the data.