This chapter provides an overview of the economics of influencers and social media stardom. It provides the state-of-research regarding success factors, revenue and payment models, social media platforms and ecosystems, and welfare effects. It describes the role of social media content providers...

This paper examines one of the most important marketing strategies by software producers on the Internet. That is whether to offer free samples and if so, whether to list the samples on shareware repositories. I show that firms with higher value products have a greater incentive to offer free...

Search frictions can explain why the "law of one price" fails in retail markets and why even firms selling commodity products have pricing power. In online commerce, physical search costs are low, yet price dispersion is common. We use browsing data from eBay to estimate a model of consumer...

Digital platforms use recommendations to facilitate the exchange between platform actors, such as trade between buyers and sellers. Platform actors expect, and legislators increasingly require that competition, including recommendations, are fair—especially for a market-dominating platform on...

This paper provides an analysis of the competitive process in the market for personal current accounts in the United Kingdom. Using survey data, we first describe some stylised developments in this market over our sample period (1996-2001). We find a gradual change in the distribution of market...

Google distributes proprietary applications for its open-source Android mobile operating system (OS) free of charge. Some of those applications (apps) are offered together as a suite of apps known as Google Mobile Services (GMS). Manufacturers of mobile devices can agree, pursuant to Google's...

Since 2010, Google, Apple, Facebook, Amazon, and Microsoft (GAFAM) have acquired more than 400 companies. Competition authorities did not scrutinize most of these transactions and blocked none. This raised concerns that GAFAM acquisitions target potential competitors yet fly under the radar of...

Since 2010, Google, Apple, Facebook, Amazon, and Microsoft (GAFAM) have acquired more than 400 companies. Competition authorities did not scrutinize most of these transactions and blocked none. This raised concerns that GAFAM acquisitions target potential competitors yet fly under the radar of...

We analyze a market where firms compete in a conventional and an electronicretail channel. Consumers easily compare prices online, but some incur purchaseuncertainties on the online channel. We investigate the market shares of the two retailchannels and the prices that are charged. We find that...

We analyze a market where firms compete in a conventional and an electronicretail channel. Consumers easily compare prices online, but some incur purchaseuncertainties on the online channel. We investigate the market shares of the two retailchannels and the prices that are charged. We find that...