Since the publication of A.W. Phillip's (1958) influential paper on the relationship between unemployment and the rate of change of the money wage rate, count• less studies have appeared to refine, reformulate and re-estimate structural equations explaining the rates of change in the wage rates and the price level or inflation rates. 1 The empirical findings of the Phillips curve relationships during the past two decades have been considered to be a contentious issue particularly in developed countries. 2 Despite the fact that the original hypothesis of the Phillips curve has been questioned and challenged,3 nevertheless, the importance of this subject has been preserved by its continued relevance for policy. Not only that, Friedman (1970, 1971) claimed that the Phillips curve plays the important role of the "missing equation" separating his own quantity theory of money from the Keynesian theory.