It's not easy to achieve reform of the tax code, spending on infrastructure, and progress on green energy.

BBC: Four more years of what?

These could range from an overhaul of the tax code to deregulation of farming and the opening up of protected areas of the economy, such as transport and energy, to foreign competition.

ECONOMIST: Japan's debt problem

In practice, agreement on a voluntary code of conduct, which would probably need unanimous approval, may prove no easier to reach than agreement on the energy-tax directive.

ECONOMIST: European Union