Analysing the Portuguese Mobile Market

In this paper we use the methodology developed hy Banker, Chang and Majumdar (1993) in order to examine and evaluate dimensions of performance for the three Portuguese mobile operators in the period between 1991-2001. Performance is measured using a multi-period ratio analysis mock], which enables decomposition or profitability into 4 components: productivity. price recovery, product mix and capacity utilisation. The results have shown an imitation pattern between the three firms. The findings have also shown that the increase in competition following liberalization, induced a shift in the operators\u27 strategies from differentiation to low cost