It would be best to broaden the new round to areas such as industrial tariffs, investment and competition policy, to allow more scope for the trade-offs on which a final deal depends.

ECONOMIST: Storm over globalisation

Or allow such huge scope for making political donations to congressmen from both parties?

ECONOMIST: Fannie, Freddie and Uncle Sam

Some Cuban economists expect that in the coming months the government will grant more scope for family businesses and foreign investment, and allow state companies more autonomy.

ECONOMIST: Fidel Castro steps down