In dealing with telecom operator and internet mergers in the late 1990s the European Commission adopted a pessimistic view of competition based on the then emerging theory of network effects. This paper takes a short and critical look at the Commission's use of network effects theory, and its...

This paper proposes a simple model for multiple second-price auctions which run parallel to each other, in the sense that though they might not begin or end at the same time, they have certain periods of overlap. We characterize the equilibrium bidding strategy of the buyers and the equilibrium...

This paper presents a duopoly model of e-business technology adoption. A leader and a follower benefit from a new e-business technology with uncertain quality depending on its innovation and adoption cost and both firms' adoption timing. When innovation and adoption require large set-up costs,...

Internet auctions have recently gained widespread popularity and are one of the most successful forms of electronic commerce. We examine a dataset of eBay coin auctions to explore features of online bidding and selling behavior. We find that profit margins for bidders are slim on average, that...

Sellers sometimes offer goods for sale under both a regular price and a discount for group purchase if the consumer group reaches some minimum size. This selling practice, which we term interpersonal bundling, has been popularized on the Internet by companies such as Groupon. We explain why...

In this thesis, I have examined whether the current approach to competition policy is suitable for the distinct characteristics of the digital economy. It is particularly difficult to define the relevant market and rely on market share test as a proxy for market power in the digital economy...

The co-legislators adopted the Digital Markets Act (DMA) in July 2022. The text is landmark legislation that imposes a list of ex-ante obligations and interdictions on large online platforms acting as “gatekeepers” in some core platform services (CPS). Yet, the DMA also imposes an obligation...

We consider the merits of the recent EU’s Digital Markets Act from the perspective of innovation and value creation. We conceptualize innovation as new interactions being created by the digital platform leading to ‘value creation’, in contrast to facilitating existing interactions or...

Across industries, firms have adopted e-business to better manage their internal business processes, as well as their interfaces with the environment. However, little is known about (1) the variations in e-business adoption patterns across businesses, (2) the antecedents of such variations, and...