Is it better to split up dominant networks (like social/communication networks) or keep them whole to maximize network effects? I’ve spent 8 years creating a way to use data to answer this for Rwanda’s mobile network, using 5.3b transaction records (1/15) https://t.co/hKC8Vj2PIE

The punchline: allowing an additional competitor in Rwanda’s mobile phone system earlier could have reduced prices and increased incentives to invest in rural towers, increasing welfare by the equivalent of 1% of GDP. (2/15)

Why study mobile phones in developing countries? Mobile operators are emerging as gatekeepers to information, the internet, and, increasingly, financial transactions. (3/15)

And many of the questions faced by tech antitrust have parallels in telecom: whether to force compatibility, make it easier for users to switch, or split dominant firms. (4/15)

But would encouraging competition improve quality--or reduce it? When a network is split between competitors, each internalizes less network effects. But they may still invest to steal customers. In theory it could go either way. (5/15)