Often, fi xed-line incumbents also own the largest mobile network. We consider the effect of this joint ownership on market outcomes. Our model predicts that while fixed-to-mobile call prices to the integrated mobile network are more efficient than under separation, those to rival mobile...

We investigate cooperative investment in a new infrastructure and how it interacts with access obligations and demand uncertainty. Co-investment only increases total coverage if service differentiation and/or cost savings from joint investment, in particular due to high uncertainty, are high....