Top economists have their say on G20 summit

A group of 21 of the world's most prominent economists have called on officials from the G20 countries meeting in Washington this weekend to start thinking outside the box about longer-term reforms.

In a collection of essays published in e-book format by VoxEu.org, an economics blog, the economists argue that new approaches to the regulation of large cross-border financial institutions are now required.

Among the ideas mooted are an international bank charter, a world financial organisation,