This paper takes stock of recent developments related to online consumer ratings and reviews and their effects on consumer behaviour. It provides an overview of key consumer benefits and risks associated with user-generated feedback, and identifies consumer policy challenges, including...

This paper aims to complement the OECD Recommendation of the Council on Consumer Protection in E-Commerce by elaborating on its key principles in the context of online advertising and offering practical guidance on how to apply these principles. For these purposes, the guide provides a number of...

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...

This report presents evidence on the relationship between online platforms and businesses using these platforms to reach consumers or conduct their operations. First, we review the literature on vertical relationships both from a classic approach and from a multi-sided market perspective....

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...

This report presents empirical evidence about the internationalisation of European online firms. After describing some characteristics that define the internationalisation of firms engaged in online activities, it mainly focuses on the obstacles that these firms face when trying to sell their...

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...