Simon Anderson, Øystein Foros, Hans Kind, 15 August 2018

Media platforms traditionally delivered the widest possible audience to advertisers. This column argues that the arrival of digital competition in media has created a battle for ‘exclusive eyeballs’ – a niche audience not shared with competitors. While this increases diversity in the media, it also incentivises media outlets to polarise to attract specific groups, and to create echo chambers to retain them.

Andrea Prat, Tommaso Valletti, 26 July 2018

Competition authorities struggle to evaluate the effect of mergers between social media platforms when prices are zero and standard tools like cross-price elasticities are of little use. This column argues that social media platforms are 'attention brokers' that help incumbents maintain market power in other industries by restricting producers’ targeted access to individual consumers. User overlap is more important as a predictor of competition problems than traditional aggregate usage shares. 

Kimberley Scharf, Sarah Smith, 16 September 2016

The rise of peer to peer (P2P) fundraising – soliciting donations on behalf of a charity for undertaking an activity  – has paralleled the growth of online social networks, but the incentives driving online donation behaviour are still poorly understood. This column examines giving behaviour for a large sample of P2P fundraising projects that individuals promoted to their Facebook friends. A negative relationship is found between the number of friends and donation size. The findings suggest a ‘relational altruism’ motive, where donors give because they care about the person who is raising the money.

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