Key points are not available for this paper at this time.
J. Cubbin, P. Geroski, The Convergence of Profits in the Long Run: Inter-Firm and Inter-Industry Comparisons, The Journal of Industrial Economics, Vol. 35, No. 4, The Empirical Renaissance in Industrial Economics (Jun., 1987), pp. 427-442
Cubbin et al. (1987) studied this question.