Self?Preferencing in Markets with Vertically Integrated Gatekeeper Platforms*

The competitive strategies of ‘gatekeeper’ platforms are subject to enhanced scrutiny. For instance, Apple and Google being accused charging excessive access fees app providers privileging their own apps. Some have argued that such allegations make no economic sense when the platform's business model is sell devices. In this paper, we build a in which gatekeeper device-seller facing potentially saturated demand for its device has incentive ability exclude from market third-party suppliers service consumers buy via Foreclosure more likely if growth devices slow or negative, can harm device-seller's services inferior those offered by third parties.