Ten institutions, including California Public Employees' Retirement System (Calpers), the world's largest pension fund, have joined the UK-led effort to boost transparency in the oil and mining sectors in developing countries.

As well as Calpers, Deutsche Asset Management, F&C Management, Fidelity Investments, Hermes, Legal & General Investment Management, Merrill Lynch Investment Mangers, State Street Global Advisors, the Local Authority Pension Fund Forum and the New York State Common Retirement Fund have demonstrated their support for the inter-governmental effort.