The debate concerning the extent of monopoly welfare loss long dominated by the analysis of Harberger has been revieved with the contributions of Tullock and Posner on the one hand, and Cowling, Cowling and Mueller and Kay on the other. The thesis proposed by Tullock and Posner is that "profit"...

An informal club has members who contribute to the production of a public good to achieve status. Contributions are either in the form of money or work. A signaling equilibrium is found where full separation occurs and efficient choices are made whether to contribute in terms of work or money....

The possibility of a convex industry demand function's leading to two local profit maxima for a monopolist supplier is found to extend to a model of monopolistic competition where two classes of consumers are distinguished by their relative demand for the industry's products. A long-run,...

In a model of competition with imperfect consumer price information and incomplete price search, some consumers may end up comparing prices originating from the same supplier: either because one firm sets multiple prices or because a group of firms colludes. This leads to added monopoly power...