This paper explores how social interactions among consumers shape markets. In a two-country model, consumers meet and exchange information about the quality of the goods. As information spreads, the demands evolve, affecting the prices and quantities manufactured by profit-maximizing firms. We...

On behalf of 65 professors, this brief supports the student-athletes in NCAA v. Alston. The brief has three main points.First, the Petitioners (the NCAA and athletics conferences) seek to unwind a century of antitrust law by obtaining immunity for anticompetitive conduct. The NCAA, alone among...

This paper examines the output effect of third-degree price discrimination in symmetrically differentiated oligopoly. We find that when the sellers' input costs are chosen endogenously by an upstream supplier with market power, as opposed to being fixed exogenously, long-standing qualitative...

Greek abstract: Η μέχρι τώρα έρευνά μου που αποκαλύπτει θεμελιώδη λάθη της συμβατικής (νεοκλασικής) οικονομικής θεωρίας, βασίζεται κυρίως στη (λανθασμένη) αντίληψη της...

Understanding the economic and social effects of the recent global trends of rising market concentration and market power has become a policy priority. To fill this knowledge gap, this paper introduces a simple simulation method, the Welfare and Competition tool (WELCOM), to estimate with...

The so-called excess-entry theorem (Mankiw and Whinston 1986, Suzumura and Kiyono, 1987) establishes conditions guaranteeing that more firms enter a homogeneous Cournotoligopoly in equilibrium than a benevolent government prefers. We generalise the approach and analyse the behaviour of a...

The relationship between privacy and competition law is complex and contentious. May or should compe- tition agencies consider business conduct’s negative impact on privacy when this effect was the conse- quence of a restriction or absence of competition? This contribution critically assesses...

We study platform design in online markets in which buying involves a (non-monetary) cost for consumers caused by privacy and security concerns. Firms decide whether to require registration at their website before consumers learn the price and all relevant product information. We show that a...

A city establishes a garbage collection company in order to generate revenue, but destroys the business of an existing private garbage collection company in the process by supplanting the private company's customer base. As a general proposition, the private company has no right to complain...

We investigate the impact of strategic consumer behavior on retailers' dynamic pricing decisions. We present a stylized two-period model, and test the equilibrium predictions in a set of behavioral experiments in which human subjects played the role of pricing managers. Our main insight is that...