The paper provides new evidence on proxy indicators of market power for major European countries. The data shows moderately increasing average industry concentration over the last two decades, a considerably increasing proportion of high concentration industries, and an overall tendency towards...

We study the dual relationship between market structure and prices and between market structure and investment in mobile telecommunications. Using a uniquely constructed panel of mobile operators’ prices and accounting information across 33 OECD countries between 2002 and 2014, we document...

In the last two decades, over 75% of U.S. industries have experienced an increase in concentration levels. We find that firms in industries with the largest increases in product market concentration have enjoyed higher profit margins and more profitable M&A deals. At the same time, we do not...

The ubiquitous process of digitization changes economic competition on markets in several ways and leads to the emergence of new business models. The increasing roles of digital platforms as well as data-driven markets represent two relevant examples. These developments challenge competition...

Dieser Beitrag fasst die ökonomischen Besonderheiten von Unterhaltungsmärkten zusammen und legt dabei einen besonderen Fokus auf Digitalisierungseffekte. Dabei werden die Aspekte Erfahrungsgüter und Qualität, Fixkostendegression & Güterheterogenität, Super-stareffekte, die Rolle...

This paper develops a theory of oligopoly and markups in general equilibrium. Firms compete in a network of product market rivalries that emerges endogenously out of the characteristics of the products and services they supply. My model embeds a novel, highly tractable and scalable demand system...

We study the effect of market structure on a personal computer manufacturer’s decision to adopt new technology. This industry is unusual because there exist two horizontally segmented retail markets with different degrees of competition: the IBM-compatible (or PC) platform and the Apple...

We investigate the relationship between market structure and platforms' incentives to adopt technological innovations in two-sided markets, where platforms may find it optimal to charge zero price on the consumer side and to extract surplus on the advertising side. We consider innovations that...

Google wird häufig als marktmächtig bezeichnet. Grund dafür ist ein mutmaßlicher Marktanteil von über 90% in manchen Ländern. Eine gründliche Marktabgrenzung im wettbewerbsrechtlichen Sinne liegt dieser Aussage aber nicht zugrunde. Was umfasst den „Suchmarkt“? Wird z.B. zwischen...