In this paper, I examine duopoly with multi-services, where firms offer delivery prices and mill prices at the same time, and each consumer chooses one of them. In the equilibria, firms specialize in delivery services even if their transport costs are higher than consumers'. This result is...

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...