The report examines the steel tube market segment of the steel industry. One of the main aims of the report is to substantiate oligopolistic behaviour among Australian steel tube manufacturers. It does this both quantitatively and qualitatively. In a qualitative sense, oligopoly theories are discussed in the context of an industry case study. Quantitatively, a number of mathematical models based on data from 1979-1989 are analysed using multivariate linear regression and a simultaneous equations method. The results of these are compared to the qualitative observations for general agreement. The analysis yields that the market segment is characterized by the price leadership model using cost based pricing.
Price collusion between manufacturers is not evident as imports are demonstrated to restrain tube pricing. In particular imports have had a significant effect on Australian tube manufacturers since 1984.