). In this paper we introduce a model of ‘porting’ in such markets where porting denotes the conversion of ‘software’ or … the impact on equilibrium and the consequences for welfare of the ability to control porting. Specifically, we show that … the welfare costs associated with the ‘control of porting’ may be more significant than those arising from pricing alone …

). In this paper we introduce a model of `porting' in such markets where porting denotes the conversion of `software' or … the impact on equilibrium and the consequences for welfare of the ability to control porting. Specifically, we show that … the welfare costs associated with the `control of porting' may be more significant than those arising from pricing alone …