We illustrate conditions under which a trade platform selling its own products alongside third-party sellers benefits or harms consumers. This benefits consumers by lowering prices in a suite of models: a gatekeeper platform facing a competitive fringe of sellers, when fringe sellers also have...

The paper studies the use of emission taxes and feed-in subsidies for the regulation of a monopoly that can produce the same good with a technology that employs a polluting input and a clean technology. In the first part of the paper, we show that the efficient solution can be implemented...

Roy (Safety First and the Holding of Assets, 1952) argues that decisions under uncertainty motivate firms to avoid bankruptcy. In this paper, the authors ask about the behaviour of a monopolist who pre-commits to price when she has only probabilistic knowledge about demand. They argue that...

This paper extends the traditional analysis of the output effect under monopoly (third- degree) price discrimination to a multimarket oligopoly. The author shows that under oligopoly price discrimination, differences in competitive pressure, measured by the number of firms, across markets are...

Usury is a frequent occurrence in consumer credit markets and particularly affects low-income households. Although the term usury conjures images of a greedy individual consciously acting to exploit the weak bargaining position of another by deceitful and even fraudulent means, we consider it as...

This paper studies the price-setting problem of a monopoly that in each time period has the option of failing to deliver its good after receiving payment. The monopoly may be induced to deliver the good if consumers expect that the monopoly will not deliver in the future if it does not deliver...

The concepts of rentiership and intellectual monopoly have gained increased prominence in discussions about the transformation of global capitalism in recent years. However, there have been few if any attempts to construct measures for rentiership and intellectual monopoly using firm-level...

The rise of hybrid-conglomerate platforms like Google, Apple, Microsoft, Amazon, and Meta (GAMAM) has led to significant market power concentration and negative competition implications, right down to calls for their potential breakups. To expand dominance, these platforms leverage extensive...

We analyze the effect of taxation in the online sport betting market. A relevant characteristic of this market is its negligible marginal cost on bet volume. Taxation can be on gross profit (Gross Profit Tax) or on volume (General Betting Duty). We model the two most popular online sport betting...

The co-existence of external referencing pricing (ERP) and reimbursement policy is common in many countries. Thus, this research examines whether or not the imposition of ERP is socially desirable in the presence of reimbursement policy. For direct sales channel, we find that the home social...