We provide the first estimates of the extent of common ownership of competing firms in Australia. Combining data on market shares and substantial shareholdings, we calculate the impact of common ownership on effective market concentration. Among firms where we can identify at least one owner, 31...

We provide the first estimates of the extent of common ownership of competing firms in Australia. Combining data on market shares and substantial shareholdings, we calculate the impact of common ownership on effective market concentration. Among firms where we can identify at least one owner, 31...

This paper presents simple conditions for monopoly third-degree price discrimination to have negative or positive e¤ectson aggregate consumer surplus. Consumer surplus is often re-duced by discrimination, for example when total welfare (con-sumer surplus and pro…ts) falls. Surplus increases...

An indivisible good is an ideal type with interesting properties and strong implications about public policy. It is a good - such as a heart transplant or a treatment for AIDS - that must be consumed in a fixed amount or not at all. The community's demand curve for an indivisible good is a...

For quite a long time, network industries used to be regarded as (natural) monopolies. This was due to these industries having some special characteristics. Network externalities and economies of scale in particular justified the (natural) monopoly thesis. Recently, however, a trend towards...

"Destructive Creation" is the deliberate introduction of new, perhaps improved generations of durable goods that destroy, directly or indirectly, the usage value of units previously sold inducing consumers to repeat their purchase. This paper discusses this practice by a single seller in an...

We examine the pricing decision of a multi-product monopolist in a two-sided market where the type structure of buyers on one side of the market is an important determinant of profit on the other side. In this situation it might be optimal to set prices below the maximum sellout price and to...

I revisit the dominant-firm model and discuss its implicit assumption of a sequential move structure. I argue that a simultaneous move structure is often more reasonable and derive an alternative formulation of the model based on this approach. -- dominant firm ; monopoly with fringe ;...

The paper studies the impact of homophily on the optimal strategies of a monopolist, whose marketing campaign of new product relies on a word of mouth communication. Homophily is a tendency of people to interact more with those who are similar to them. In the model there are two types of...

This paper studies an industry where firms can choose to provide open or closed platforms. Open, as opposed to closed, platforms are extendable so that third-party producers can develop extensions for them. Building on a two-sided market model, I show that firms might prefer to commit to keeping...