This report provides an overview of the relevant economic research literature on platforms or multi-sided online markets. It discusses platforms from a regulatory policy angle, including potential market failures in platforms, the extent of self-regulation and possible regulatory responses...

The aim of this paper is to explain evidence of unfair practices by online platforms towards business users, particularly SME's. First, using survey data, we show that sellers operating with four different categories of platforms multi-home (marketplaces, app stores, social networks and online...

We extend the theory of tax incidence under Cournot-Nash oligopolistic competition to study the effects of an ad valorem sales tax on Web services (so-called Web Tax) that are provided free of charge to users, and produce advertising space sold to businesses. Ads are more valuable to advertisers...

Computational methods to gauge investor sentiment from commonly used online data sources that rely on machine learning classifiers and lexicons have shown considerable promise, but suffer from measurement and classification errors. In our work, we develop a simple, direct and unambiguous...

Online advertising is now the dominant form of advertising in many OECD countries, and offers businesses the ability to reach consumers in ways that could only have been imagined previously. Online advertising has the potential to benefit consumers through more relevant and timely advertising,...

It is often assumed that consumers benefit from the internet because it offers a "long tail" with more variety of products to choose from. However, search costs may block the long tail effect and result in the dominance of superstars. This paper examines the variety hypothesis in the entire...

Between 2009 and 2012 the percentage of online consumers in the EU who made online purchases in another EU Member State increased from 8 to 11 per cent, below the target of 20 per cent put forward in the EU Digital Agenda. Both, subjective perceptions on the consumer side or objective barriers...