S6 Ep13: Corporate taxation and carbon emissions

How does the rate of tax that firms pay relate to their carbon emissions? If firms that pay less emit more, then taxation may be delivering a subsidy on pollution. If those that pay less emit less, then taxation may also be helping to protect the environment. Luigi Iovino and Julien Sauvagnat of Bocconi University tell Tim Phillips whether browner firms pay more or less tax – and why.