No sooner has summer ended than it’s almost Christmas – how has this happened? In between meetings and paper-writing, I have managed to read a few things. Two thrillers on journeys to and from a family visit last week, John Le Carre’s A Legacy of Spies and one of the outstanding Mick Herron Jackson Lamb series, Spook Street – highly recommended if new to you.

On more serious matters, I’m half way through the handsome new Stripe Press edition of Mitchell Waldrop’s The Dream Machine. And I’ve finally read Tim Wu’s The Curse of Bigness. This is a very interesting, and commendably concise, history of US anti-trust legislation and enforcement. The argument in a nutshell is that anti-trust was born out of a power relations confrontation between the original trusts – Rockerfeller, Carnegie etc – and the US government: Theodore Roosevelt determined on trust-busting to establish the primacy of government power. To some extent this tradition continued after the second world war with landmark cases against AT&T and IBM. But, Wu continues, the Chicago school and especially Robert Bork defanged US anti-trust enforcement by embedding so thoroughly an economic test based on a consumer welfare standard as measured only by consumer prices. Today, with digital giants so often charging zero or low prices, this is less appropriate than ever. The time has come to reaffirm that the government, not rent-extracting monopolies, runs the country.

This is an interesting and persuasive account. It is also a specifically American one. Although the underlying economic analysis concerned crosses the Atlantic, there has never been such a narrow interpretation either of consumer welfare or of how to measure it in Europe. The test in UK law is a ‘substantial lessening of competition’ with reasonably wide discretion for the competition authority, and the guidance sets out other dimensions of welfare such as quality, range, innovation – although of course price is the easiest to measure. We have had prominent cases looking at monopsony power, such as the inquiry into supermarkets. Nor has there ever been on this side a routine acceptance that the benefits of vertical integration or horizontal merger can be assumed to be passed on to consumers – in my cases we always asked about the incentive as well as the scope for efficiencies to be passed on. And, as Wu notes at the end of the book, the UK’s market inquiry tool can be very powerful.

Having said all this – and cautioning against translating Wu’s account and other influential authors such as Lina Khan – to non-US contexts, this does not mean the question of monopoly power is not a pressing one here too. The UK has an inquiry into digital competition under way (chaired by Professor Jason Furman – I’m a member). In other markets from insurance/banking to pharma there are very powerful and profitable firms sustaining their position over long periods and scant sign that new entry is possible. As I’ve written in a forthcoming paper, the competition authorities need tools to assess dynamic, Schumpeterian competition as well as their everyday static toolkit.

Behind the technicalities, there is also the issue of political power highlighted by Wu’s book. Most economists would be hesitant to re-politicise competition policy after the dire experiences of big companies using their lobbying power to protect themselves before the present regime came into force. Two former DGs of the UK’s Office of Fair Trading, John Fingleton (here) and John Vickers, have rightly pointed to the vast expansion of arbitrary ministerial say-so over mergers in proposed UK legislation. This is a route sure to make consumers worse off.

At the same time, there are valid political questions. Some companies in a number of sectors have become simply too powerful. Paul Tucker’s recent book Unelected Power highlights these, arguing for a tilt in the balance away from technical economic analysis toward political choice. I’m not persuaded that the problem stems from the use of economics in competition policy, such that dethroning economic analysis would fix the pwer imbalance. However, there do seem to be some unresolved tensions between the economic standards for assessing competition in a market, the legal interpretations, and the politics.

Much food for thought in a short book. The Curse of Bigness is a great stocking filler for the economists and lawyers in your life.

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