This paper summarizes the peculiarities of online markets and discusses recent antitrust cases related to online markets. Following a brief description of the online markets' characteristics and potential tendencies for concentration the paper first discusses the antitrust allegations and...

This paper provides an empirical analysis how tariff diversity affects fixed-line broadband uptake, utilizing a new data set with 1497 fixed-line and 2158 mobile broadband tariffs from 91 countries across the globe. An instrumental variable approach is applied to estimate demand, controlling for...

This paper explores how consumers react towards price differentiation between on-net and off-net calls in mobile telecommunications - a pricing policy that is common in many mobile telecommunications markets. Based on a survey of 1044 students we demonstrate that some consumers may suffer from a...

The German reserve power market was subject to important regulatory changes in recent years. A new market design was created by synchronization and interconnection of the four control areas. In this paper, we analyze whether or not the reforms led to lower prices for minute reserve power (MRP)....

This is the first paper that studies the causal effect of studying economics on subjective well being. Based on a survey among 918 students of economics and other social sciences, we estimate the effects of studying in the different fields on individual life satisfaction. Controling for personal...

This paper examines the relation between crowd support and home advantage in professional soccer. For that purpose, we make use of a unique "natural experiment": so-called ghost games in the three top divisions of German professional soccer during the Corona pandemic. We find that there is a...