Jean Tirole has won a deserved Nobel prize. The French economist from Toulouse 1  his work in the field of industrial organisation that particularly stands out, and which drew admiring words from the the Nobel Committee:

Jean Tirole is one of the most influential economists of our time. He has made important theoretical research contributions in a number of areas, but most of all he has clarified how to understand and regulate industries with a few powerful firms.

This field of research answers questions about how market power distorts market outcomes and hurts consumers. It also attempts to describe what governments can do about it.

Power gamesWe can all see the new Nobel laureate’s relevance in the modern world by looking in some detail at just one of his innovations. The privatisation of utility companies in the 1980s and 1990s in many countries, both in Europe and elsewhere, was designed to bring entrepreneurship and private investment into this industry. However, it was clear from the outset that this market would be dominated by a few large firms and that competition would not serve to limit the prices these firms charge to customers. It was clear that government intervention is needed to do this – and an obvious regulatory policy measure was at the time to cap the prices of these firms.

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However, the early work of Tirole with Jean-Jacques Laffont pointed out that this early regulatory measure is counter productive. Low prices ultimately require low costs, hence the regulator also wants to ensure that the utility companies reduce their costs. Unfortunately, price caps induce utility companies which have less scope for cost reduction to reduce the quality of their service in order to lower their costs. Since the regulator does not know which firm has more scope for cost reduction and which has less, it cannot cap prices differently across firms.

Tirole and Laffont’s work implied that if the regulator offered two types of contract for utility companies – one with the usual price cap, and another one where the government shares the costs with the utility company, the former will be chosen by firms who can reduce costs more easily and the latter by firms who find it more difficult. Both then will have an incentive to reduce costs. This is less costly for society than the simple price-cap.