Pensions Fund infrastructure investment has been steadily increasing its share of the asset mix over the last 20 years. Here we list some of the top research and white papers on infrastructure investment for pension funds and other institutional investors. Some Australian and Canadian pension funds have 20 years experience of infrastructure investing, and one of our most popular papers on infrastructure investing for pension funds draws lessons from their experiences. Most pension funds lack experience in infrastructure as an asset class, meaning that guides to infrastructure investing are popular.... For pension funds unable to consider private infrastructure investment, listed infrastructure is an alternative which can provide liquidity and diversification, and we feature a number of white papers on listed infrastructure investments. Private infrastructure is an illiquid asset, so pension fund investors need to consider not just the trade-off between return and risk, but also the third dimension of liquidity. Private infrastructure investment can also pose political and regulatory risks, and one popular article for pension funds considers the mitigation of these risks. Other topics explored in this section include green infrastructure, infrastructure governance, infrastructure finance, and infrastructure debt valuation. Analysis of the top infrastructure asset managers and pension fund investors can be found in the Towers Watson Global Alternatives Survey, while Preqin provide regular investor reports and occasional special reports, such as on service providers in infrastructure investment.