The Obama administration is expected on Wednesday to propose a reorganisation of the way we regulate financial markets. I am not an advocate of too much regulation. Having gone too far in deregulating – which contributed to the current crisis – we must resist the temptation to go too far in the opposite direction. While markets are imperfect, regulators are even more so. Not only are they human, they are also bureaucratic and subject to political influences, therefore regulations should be kept to a minimum.

Three principles should guide reform. First, since markets are bubble-prone, regulators must accept responsibility for preventing bubbles from growing too big. Alan Greenspan, the former chairman of the Federal Reserve, and others have expressly refused that responsibility. If markets cannot recognise bubbles, they argued, neither can regulators. They were right and yet the authorities must accept the assignment, even knowing that they are bound to be wrong. They will, however, have the benefit of feedback from the markets so they can and must continually recalibrate to correct their mistakes.