Having outlined the potential concerns relating to pension fund investment in hedge funds, the OECD carried out a survey to investigate what information pension fund regulators have on these investments and how they are being controlled. The survey confirms that pension fund regulators have little information regarding how pension funds in their jurisdiction are investing in hedge fund products (in terms of size of investments, the types of hedge funds pension funds are exposed and to what type of product). Only the Slovak Republic and Mexico (for the mandatory system) prevent pension funds from investing in hedge funds. Although the level of such investment is still very low in other countries, it is almost universally expected to increase. Few countries impose specific quantitative investment restrictions on pension fund investment in hedge funds, with most regulators exercising control via general investment restrictions and requirements (for diversification, transparency, through the prudent person rule etc.). Some regulators have provided pension funds with further guidance as how to handle these instruments. In terms of policy issues, most concern centre around financial risk control and how to improve transparency and disclosure in relation to these investments.