In diesem essential erklären die Autoren, unter welchen Umständen es zu Marktversagen kommt und das freie Spiel der Marktkräfte nicht zu einem gesellschaftlich wünschenswerten Ergebnis führt. Sie diskutieren, ob und, wenn ja, welche Staatseingriffe zu einer Erhöhung der Wohlfahrt führen....

We analyze the substitutability between brick-and-mortar stores and e-Commerce. Using a novel data set on the German book market we find that between 26 and 55% of the decrease in book sales from 2014-2017 can be explained by the decrease in the number of bookstores. This indicates that...

We empirically analyze the role of e-Commerce and brick-and-mortar retailers in discovering new bestsellers in the book market, using the German market as an example. Using an AR(1)-Process, we find that when a title becomes a bestseller sales increase in e-Commerce and decrease in...

This article investigates the efficiency of the roll-out of Covid-19 vaccinations when vaccines are scarce. Using Germany as an example, we find considerable differences across federal states in terms of efficiency, defined as the ability to get most vaccinations out of a given number of...

This paper reexamines the effect of the regulatory regime on both penetration and coverage of broadband access to the internet. The framework also allows for an evaluation of different public policy measures such as subsidization of broadband demand and supply. A welfare analysis asks what the...

This paper re-examines the effect of the regulatory regime on both penetration and coverage of broadband access to the internet. The framework also allows for an evaluation of different public policy measures such as subsidization of broadband demand and supply. A welfare analysis asks what the...