Spatial models of heterogeneous switching costs

The presence of sticky, often labelled ‘unengaged’, consumers is arguably one of the most intractable issues faced by competition regulators, in that it entrenches incumbency advantage. We develop a spatial linear model of heterogeneous switching costs that allows for asymmetric distributions of heterogeneous switching costs. We not only model uniform pricing and history-based price discrimination, but also the impact of regulatory intervention aimed at making it easier for customers to be upgraded to a better tariff from their current service provider, something we call ‘leakage’. Finally, we analyse firms’ incentive to adopt history-based price discrimination and voluntarily permit ‘leakage’.