C. Scott Hemphill and Nancy L. Rose on ‘Mergers that Harm Sellers’ (2018) Yale Law Journal 127(1) 2078

In typical mergers, the main concern is that the parties will be able to raise the prices they charge purchasers. Some mergers, however, reduce competition among competing buyers, thereby reducing the prices that sellers receive for their products and services. These adverse “buy-side” effects may harm a wide variety of sellers, including workers.  This paper, available here, examines the antitrust treatment of mergers that harm sellers. Its central claim is that harm to sellers in an input market is sufficient to support antitrust liability. Part I considers mergers that increase classical monopsony power. Monopsony is used here as the mirror image of monopoly, i.e. market power susceptible of affecting the price of inputs. Monopsony is a frequent concern in labour and agricultural markets. As with lawfully acquired monopoly power, antitrust law does not prohibit the exercise of lawfully acquired monopsony power, despite its economic costs. Yet antitrust problems do arise when buyers increase their monopsony power by combining forces. Agreements…

Ioana Marinescu and Herbert Hovenkamp ‘Anticompetitive Mergers in Labour Markets’ (forthcoming) Indiana Law Journal (2018)

The paper – which can be found here – looks at mergers that facilitate anticompetitive wage and salary suppression from an antitrust perspective. It also looks at other potentially anticompetitive practice in labour markets, so the paper’s title is misleading. The paper’s fundamental argument is that that antitrust law is under-enforced as regards mergers affecting employment markets, and that this is important for several reasons. First, the share of the gross domestic product (GDP) going to labour has been declining at an alarming rate, and this seems to be correlated with an increase in market concentration. Second, US antitrust law does not condemn unilateral price setting by dominant firms – including the setting of wages. A second best solution to the problem of suppressed wages can therefore be found in merger law, which can interdict wage-suppressing mergers before they occur. Third, antitrust law is properly directed at all output reducing practices, and there is certainly no principled reason for excluding…

Suresh Naidu, Eric A. Posner, and E. Glen Weyl ‘Antitrust Remedies for Labor Market Power’ Harvard Law Review (forthcoming)

The paper – which can be found here –  criticises the historic imbalance between product and labour market antitrust enforcement, which has no basis in economic theory: from an economic standpoint, the dangers to public welfare posed by product and labour market power are exactly the same. It is argued that antitrust agencies should take more seriously the danger that mergers may lead to labour market power as well as product market power. The paper is organised as follows: The introduction tries to explain why antitrust has traditionally ignored labour markets. Four explanations are advanced: (i) while economic theory treats product and labour markets similarly, legal theory has placed more emphasis on product markets as a result of a focus on consumer welfare; (ii) it was assumed that labour markets are reasonably competitive, and that labour market power was not an important social problem; (iii) the traditional legal approach to protecting workers, which took place “outside” antitrust law, may have…