Is now the time to rethink and refocus the €3bn ($3.3bn) European governments spend each year on subsidies to support parts of the shipping industry? That is the strong argument made in a newly published report compiled by Olaf Merk at the OECD's International Transport Forum.

At this moment of fundamental change across the industry, with the pressure for ever-greater efficiency and the looming urgency of decarbonisation, the issue demands close examination and action.