Purpose - This research aims to identify the optimal configuration of investment which leads firms to their best competitive positions, considering the degree of concentration in the market. Design/methodology/approach - The methodology was quantitative and based on secondary data with samples...

The decision to incinerate hazardous industrial waste in cement plants (the so-called 'co-incineration' process) gave rise to one of the most heated environmental conflicts ever to take place in Portugal. The bitterest period was between 1997 and 2002, after the government had made a decision....