Zijun Wang, "Convergence of Productivity: A Comment", Journal of Applied
Econometrics, Vol. 21, No. 7, 2006, pp. 1101-1102.

This paper uses data from

Hobijn B, Franses PH. 2000. Asymptotically perfect and relative convergence
of productivity.  Journal of Applied Econometrics 15: 59-81.

The data are available elsewhere in the JAE Data Archive. The URL is

  http://qed.econ.queensu.ca/jae/2000-v15.1/hobijn-franses/

The revised Gauss procedure mentioned in the paper is saved in the file
Pvalue_R.txt.