The first time my research gained wide publicity was in 1979. In collaboration with another young academic, I explained that many large British companies paid no corporation tax. The issue resurfaces again as my co-author retires from the Bank of England.

This week’s Group of Eight meeting produced denunciations of secrecy and tax havens. But the sources of the problem are not to be found in Bermuda or the Channel Islands. The activities that escape taxation take place in the G8. The correct starting point is the flawed structure and implementation of corporation tax in the G8 itself.

Corporation tax is a levy on the profit a company earns for its shareholders. It is therefore both a tax on corporate activity and on shareholders, and it is not well designed to achieve either purpose. It is not robust administratively or economically. Complex and vulnerable to avoidance, it produces major distortions of both investment and financial decisions of companies.